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iButtonLink LINK 12 User Manual Download Page 56

 

The LINK™ Family Manual 

Version 1.6 ©iButtonLink, LLC 2016 

Page 56 

A

PPENDIX 

A: Power Issues and Requirements 

 

The Link12, Link12i, Link45, 

and

 Link45i

 devices obtain power to operate by “robbing” it 

from two of the host DBN-9 serial port’s available signal lines. These signals (DTR and RTS) 
should both be held in the high state for best performance. However, the LINK device will often 
operate just fine with only one of these lines high. The LINK

TM

 devices use an efficient 

switching regulator to convert the port pin power to useable levels with minimal losses.  
 
Different terminal programs handle the signal lines in different ways. If both RTS and DTR are 
taken low for a few seconds, The LINK device will be robbed of all power and will be reset to its 
power-up state. If the host computer is a very low power type, such as a laptop or palm-top 
computer, it may not provide sufficient operation power for the LINK device. In the situation 
where port power may not be sufficient, it is important to make sure that the host program holds 
both DTR and RTS in the high state.

 

 

Many very small (palm-top) computers generate serial signals that are as low as 3 volts (which 
are not legal RS232 voltages). These computers will NOT work with the LINK

TM

 devices. 

Desktop PCs and quality laptops will provide valid RS232 signal levels and more than enough 
power to operate the LINK device. 
 
The LINK

TM

 devices provide an auxiliary I/O line on the RJ connector. This line, by default, is 

driven to the high impedance state and left unpowered. When set to the 5V level by the “ d ” 
command, this line can be used to provide power for type 1-Wire® devices. However, the 
current available from this output is limited. The amount of current that the Aux line can provide 
depends on the amount of power available from the serial port used. As a rule, the load on the 
Aux line should be limited to less than 20 mA. 
 
Conversely, the 

LinkHub-S and LinkHub-E require an external power source in order to 

operate. 

These two products need a supply that provides 

500 mA of +12 V

. The DC barrel 

should have the specifications found below in Table 7. 
 

OD  

5.5 mm 

ID  

2.5 mm 

Length 

11.8 mm  

Other 

Negative to center post 

 
 

 

Table 7: DC barrel specifications

 

Summary of Contents for LINK 12

Page 1: ......

Page 2: ...The LINK Family Manual Version 1 6 iButtonLink LLC 2016 Page 2 ...

Page 3: ...Flex Timing Modes 10 EPROM Programming 10 Device Version 10 Important Information for the LinkOEM the LinkHub E and the LinkHub S 11 LinkOEM 11 LinkHub S 11 LinkHub E 11 ASCII Control Functions 12 General 12 Case Sensitivity and Symbols 12 Active Channel Mask 13 Arrival Departure Scanning 14 Auxiliary Line High Impedance 15 Auxiliary Line High Power Low Impedance 16 Auxiliary Line Low Power Impeda...

Page 4: ...t 34 Pass Thru Mode 35 RAM Register States Dump LinkHub E 36 RAM Register States Dump LinkHub S 37 Read EEPROM ASCII Data 38 Read EEPROM Hex Data 39 Relax Timing 40 Report Active Channel Mask 41 Report EEPROM Read Write Address 42 Report Maximum Internal EEPROM Address 43 Report Scan List 44 Search Type 45 Set EEPROM Read Write Address 46 Sniffer Mode 47 Status of Bus Bus Reset 48 Turn Off Dynamic...

Page 5: ...NDIX J LinkOEM Pin Outs 67 APPENDIX K FxB Protocol 68 APPENDIX L USING 1 WIRE VIEWER WITH A LINKUSB 69 Using 1 Wire Viewer with Other Link Devices 70 Index of Commands by Device 71 Glossary of Terms 73 Revision History 77 List of Figures Figure 1 Command showing the arrival of a T Sense and a T Probe on a LinkUSB 14 Figure 2 Command showing the departure of a T Sense and a T Probe on a LinkUSB 14 ...

Page 6: ... Figure 17 Command m returning 0001FF CR meaning that the next byte to be read written is 0001FF hex 42 Figure 18 The first two lines show the results of arrivals being scanned with command The next line is a line break which was caused by command Following the line break are the results of command which are the serial numbers of the T Probe 44 Figure 19 Command M000100 wThis is a test CR writes 1...

Page 7: ...egrated is the originator and manufacturer of the 1 Wire and iButton devices as well as various accessories Some terms used in this document may be trademarks of Maxim Integrated and are used with their permission Application note 244 from the Maxim Dallas website describes the improvements implemented by the LINKTM devices in greater detail Copyright Notices Copyright iButtonLink LLC 2002 2003 20...

Page 8: ...de takes advantage of the fact that family code 0x00 is invalid If Maxim Dallas ever deploys a normal mode part for family code 0x00 that part can NEVER be mixed with extended mode slaves Extended mode is very similar to normal mode with several important differences Extended mode slaves only respond to command sequences that begin with an extended mode reset Reset120 Extended mode slaves do NOT e...

Page 9: ...ved There is no support for extended mode slaves using the 9097U emulation command set Serial numbers of normal mode slaves are allocated and managed by Maxim Dallas The serial numbers of extended mode slaves are allocated and managed by iButtonLink LLC DISCLAIMER iButtonLink will only support extended mode slaves manufactured by iButtonLink Extended mode is a proprietary extension of the 1 Wire p...

Page 10: ...is not an issue for most applications Higher speed mode cannot be supported because the analog components in the bus interfaces are carefully tuned for optimum long line and short line performance at standard speed Flex Timing Modes The LINKTM devices use 1 Wire waveform timing that is carefully and dynamically controlled by intelligent control algorithms Changes to flex timing mode that could be ...

Page 11: ...sses on the Link LinkOEM and LinkUSB can be up to 3 000 feet long This yields a logical 1 Wire network of 4 000 feet with four times the network weight of a standard 1 Wire bus LinkHub E Each LinkHub E contains a DS2401 serial number chip on the internal 1 Wire bus providing a unique identity The serial number will appear on 1 Wire searches unless the internal bus is deactivated It may be used to ...

Page 12: ...rformed have been coded for normal ASCII keys so that all the basic 1 Wire functions can be performed manually on the keyboard of a terminal program or using programming languages that are limited to ASCII serial port I O As a rule these special commands consist of every command code that is not used in the DS2480B 9097U emulation Case Sensitivity and Symbols ASCII commands are case sensitive Make...

Page 13: ...g a bit mask for channels that should be active There are five 1 Wire busses The bit patterns are listed in the table below A 1 makes the channel active meaning that the master will report the slaves connected to the ports A 0 makes the channel inactive meaning that the ports will be masked and those ports will not be read Bit Pattern Command Input Syntax Channel Activated 0x37 C37 All busses enab...

Page 14: ...inkOEM and LinkUSB devices The arrival will be reported as a string with an exclamation point a comma and then the arriving device s serial number The departure will be reported as a question mark followed by a comma and then the serial number of the device departed from the bus This will make sure that the device is actually gone by doing multiple reads On The LinkHub E and LinkUSB the current co...

Page 15: ...0 5 V logic level This extra I O defaults to input Hi Z mode NOTE The Link USB supports the standard RJ 45 type 1 Wire bus connection where the center two contacts of the RJ connector are the data and ground connections to the 1 Wire bus An auxiliary pin in the RJ connector can be added and used By default this line is driven to the HIGH impedance state and left unpowered It can be an output to su...

Page 16: ...lso be an input sensing a 0 5 V logic level This extra I O defaults to input Hi Z mode The Link USB supports the standard RJ 45 type 1 Wire bus connection where the center two contacts of the RJ connector are the data and ground connections to the 1 Wire bus An Auxiliary pin in the RJ connector can be added and used By default this line is driven to the HIGH impedance state and left unpowered It c...

Page 17: ...pin in the RJ connector can be added and used as an output to supply a low level 0 V or a high level 5 V It can also be an input sensing a 0 5 V logic level This extra I O defaults to input Hi Z mode The Link USB supports the standard RJ 45 type 1 Wire bus connection where the center two contacts of the RJ connector are the data and ground connections to the 1 Wire bus An Auxiliary pin in the RJ c...

Page 18: ...ut the 1 Wire driving waveform on the aux pin This can be used to extend the 1 Wire bus using other signaling protocols It can also be used to isolate the bus using optical or galvanic isolation devices The following diagram shows how isolation mode could be used to extend the 1 Wire port on the LINKTM devices The LINKTM devices also have a mode where the timing of the 1 Wire waveforms is slowed t...

Page 19: ... Link LinkHub S LinkHub E LinkOEM LinkUSB This command places the LINK device into bit mode Only single ASCII digits of 0 or 1 value are allowed and single ASCII digits are returned Hitting ENTER carriage return will end bit mode SIMILAR COMMANDS Bit Mode with Strong Pull Up b Byte Mode p Byte Mode with Strong Pull Up ...

Page 20: ...te mode Power strong pull up is applied to the bus after the last bit of the first byte is issued Only single ASCII digits of 0 or 1 value are allowed and single ASCII digits are returned Hitting the ENTER carriage return will end bit mode NOTE Subsequent bytes will be performed but will not be followed by strong pull up SIMILAR COMMANDS j Bit Mode b Byte Mode p Byte Mode with Strong Pull Up Turn ...

Page 21: ... entered will be taken as a hexadecimal byte value that is issued onto the bus The response byte is then displayed in hexadecimal Subsequent pairs of hexadecimal characters will also generate bytes allowing for streaming of bytes without intervening commands Hitting ENTER carriage return will end byte mode For The LinkHub E x will also end byte mode SIMILAR COMMANDS j Bit Mode Bit Mode with Strong...

Page 22: ...f 64 bytes Returns 132 characters followed by CR LF o The LinkHub E will return 66 pairs of hex characters M uppercase M Issue 32 byte reads to the 1 Wire bus and return results This subcommand is used to read a memory page from devices that have a page size of 32 bytes Returns 64 characters followed by CR LF o The LinkHub E will return 32 pairs of hex characters m lowercase M Issue 34 byte reads ...

Page 23: ... displayed in hexadecimal Subsequent pairs of hexadecimal characters will also generate bytes allowing for streaming of bytes without intervening commands Hitting ENTER carriage return will end byte mode For The LinkHub E x will also end byte mode This command differs from the b command in that power strong pull up is applied to the bus after the last bit of the first byte is issued Subsequent byt...

Page 24: ... With LinkHub E This command toggles channel reporting on or off for certain LINKTM devices When channel reporting is on reported 1 Wire device serial numbers are followed by a comma and the number of their 1 Wire bus The internal bus is reported as bus number five SIMILAR COMMANDS C Active Channel Reporting c Report Active Channel Mask ...

Page 25: ...es The LinkOEM to display its ID string and version number An example can be found below in Figure 7 This command causes The LinkUSB to display its ID string and version number An example can be found below in Figure 8 below SIMILAR COMMANDS s Display Serial Number LinkUSB V1 7 LinkHUB V1 11 LinkOEM V1 7 LinkHUB E V1 11 Figure 5 LinkHub S displaying its firmware version 1 11 Figure 6 LinkHub E dis...

Page 26: ...d is formatted the same as all devices The Link and The LinkUSB family codes are 0xFE The Link and The LinkUSB serial numbers are for registration and software validation purposes Each device serial number is guaranteed unique At the present time the Link and the LinkUSB serial numbers do not participate in any searches and cannot be changed after manufacturing Please refer to the Important Inform...

Page 27: ...ch to start with a particular family code The standard n or Next command is used to retrieve the next 1 Wire serial number matching the family code from the bus search Check the family code returned since the family search does not always end on the last device n the bus A is returned instead of the normal or character if there is a family search mismatch or overshoot This is shown below in Figure...

Page 28: ... command will display the serial number of the first device found For The Link and The LinkUSB if locator reporting is turned on the device serial number should be followed by a comma and the serial number of the LinkLocator associated with the 1 Wire device SIMILAR COMMAND S n Next f Family Search First Scanning Mode 8000000202214928 8000000202214928 9A00000208AC5528 9700000208994528 FFFFFFFFFFFF...

Page 29: ...d with CR LF Sniff mode h help L Locator reporting on l Locator reporting off f Family Search first O Normal slave mode P Set Page read settings p Report Page read settings X Extended slave mode s Report Link serial number h help Toggle Channel Mask Display C Set Active Channel Mask c Report Active Channel Mask E Report max EEPROM address M Set EEPROM next address m Report EEPROM next address R Re...

Page 30: ...h Link LinkHub S LinkHub E LinkOEM LinkUSB This command will test the level of the 1 Wire bus and report 0 if the bus is low or 1 if the bus is high followed by an ENTER carriage return for some LINKTM devices SIMILAR COMMANDS x Low Level 1 Figure 12 Command l returning a 1 to indicate that the level of the bus is high ...

Page 31: ...ith the 1 Wire address is appended to the reporting line If there is not a LinkLocator associated with the 1 Wire address a serial number of FFFFFFFFFFFFFFFF is reported Figure 13 Command L showing that there is not a LinkLocator associated with the 1 Wire address LinkLocator Reporting Disarmed Command l backslash lowercase L Command Compatible With The Link The LinkUSB This command can be used wi...

Page 32: ...ands that are available for the LINKTM devices These are in addition to the standard DS2480 DS9097U binary command codes that are available Table 6 shows all single character commands that are available on the LINKTM devices NOTE each line is terminated with CR LF f First Expanded Command Set n Next Thru r Reset l Level Extended 115200 b Byt NN 57600 j Byt N 38400 p BytW P 19200 BitW P x BusLo d A...

Page 33: ... low level for LINKTM devices This function is used to cause a bus wide reset by robbing power from all the bus devices for a few seconds Issue a reset r command or any bit or byte command to return the 1 Wire bus to functionality SIMILAR COMMANDS l Level Test 1 0 Figure 14 The first line shows that that bus was previously at level 1 Next command x is used which shows that the bus is now at a low ...

Page 34: ...nd in Figure 15 If this command is used again after a response is received this command will find the first part again If locator reporting is turned on the device serial number should be followed by a comma and the serial number of the LinkLocator associated with the 1 Wire device If an f family search first command is in progress next may return a if encountering a family code overshoot SIMILAR ...

Page 35: ...this mode all activity on the serial port output line is passed through inverted to the 1 Wire bus and all activity on the 1 Wire bus is inverted to the serial port input line This mode can be used to bypass LINKTM devices and allow the serial port direct access to the 1 Wire bus Because the device is no longer able to interpret serial data in this mode the only way to get out of pass thru mode is...

Page 36: ...ckslash exclamation point Command Compatible With LinkHub E This command causes a formatted dump of the RAM contents and register states to be produced on the serial interface A watchdog timer reset of the LINKTM device occurs after the dump is complete The LINKTM is rebooted at the completion of this command ...

Page 37: ... Dump LinkHub S Command exclamation point Command Compatible With LinkHub S This command causes a formatted dump of the LINKTM devices RAM contents and register states to be produced on the serial interface A watchdog timer reset of the LINKTM device occurs after the dump is complete ...

Page 38: ...nd returned as ASCII characters The read is ended by a carriage return from the EEPROM data stream A carriage return is also sent to the user EXAMPLE After entering some ASCII data into the EEPROM with M000100 wThis is a test CR wThis is line two CR WThis is line three CR wThis is the last line CR M000100 r r r r The command M000100 r r r r would return This is a test CR This is line two CR This i...

Page 39: ...certain LINKTM devices This command is followed by a two digit hexadecimal number specifying the number of bytes to read The contents of each EEPROM byte will be returned as a two digit hex number ending with a carriage return EXAMPLE The command M003FF R04 will return the contents of EEPROM addresses 0003FF through 000402 followed by a carriage return The next EEPROM read write address would be 0...

Page 40: ...and left parenthesis Command Compatible With Link LinkHub E LinkUSB This command relaxes the 1 Wire timings of the above LINKTM devices and helps to accommodate long bus lengths If you are experiencing bus errors due to reflections from busses over 300 feet in length use this timing ...

Page 41: ...inkHub E This command reports the active channel mask The LinkHub S and The LinkHub E will respond with a two character hex value reporting the current channel mask contents SIMILAR COMMANDS C Active Channel Mask Channel Reporting On Off 37 Figure 16 A LinkHub S returning a two character hex value of 37 to indicate that there is activity on the channel mask ...

Page 42: ...ercase M Command Compatible With LinkHub S LinkHub E This command reports EEPROM read write addresses for certain LINKTM devices The next EEPROM read write address will be returned followed by a carriage return m 0001FF CR Figure 17 Command m returning 0001FF CR meaning that the next byte to be read written is 0001FF hex ...

Page 43: ...in LINKTM devices The LINKTM devices will respond with a six digit hexadecimal number that represents the address specified using read write EEPROM commands The LinkHub E and LinkHub S include 32K Bytes of EEPROM memory for user configuration data This EEPROM is not part of the 1 Wire bus structure but provides local storage for general purpose use NOTE The 32 KB LinkHub S and LinkHub E have 32678...

Page 44: ...ed as a string with an exclamation point a comma and then the arriving device s serial number The departure will be reported as a question mark followed by a comma and then the serial number of the device departed from the bus This will make sure that the device is actually gone by doing multiple reads Scanning is terminated by Reset First Next or a number of other operations The scanning system w...

Page 45: ...inkHub S LinkHub E LinkOEM LinkUSB For some LINKTM devices this command will change the search type of f first and n next when followed by a two character hexadecimal value Using tF0 will make the search normal Using tEC will make the search conditional and will only discover devices for which the search conditions are satisfied ...

Page 46: ...ercase M Command Compatible With LinkHub S LinkHub E This command sets the EEPROM read write addresses for certain LINKTM devices This command is followed by a six digit hexadecimal address specifying the next EEPROM address to be read written EXAMPLE M000030 would specify address 30 hex as the next read write address ...

Page 47: ... to debug 1 Wire master programs by capturing the actual data bytes that are observed on the bus Overdrive speed is not supported by the sniffer mode NOTE For the LinkOEM sniffer mode is activated through a single backslash In sniffer mode only whole bytes are reported so any partial bytes that occur prior to a reset will not be reported Sending a break condition will cause the device to be reset ...

Page 48: ...d returns the status of the bus Status Response Description P No error at least one slave is on the bus N No error no slaves are on the bus S Short the 1 Wire bus is shorted Each line is terminated with CR LF The Link and The Link USB will display the status byte as a two character hexadecimal value following the status character P N S in extended mode NOTE Extended mode is not available on The Li...

Page 49: ...on some LINKTM devices The DPU helps extend the useable length of the 1 Wire bus by increasing the charge current at the appropriate times in the 1 Wire waveform In the rare event that the action of the DPU causes a problem on shorter networks this command allows it to be turned off The LINKTM devices respond with a carriage return line feed The DPU is turned back ON by reset of the LINKTM devices...

Page 50: ... certain LINKTM devices This command is followed by ASCII characters terminated by a carriage return CR The carriage return is written to the EEPROM M000100 wThis is a test CR wThis is line two CR WThis is line three CR wThis is the last line CR M000100 Figure 19 Command M000100 wThis is a test CR writes 15 characters to EEPROM beginning with address 000100 The next EEPROM read write address would...

Page 51: ...g the next byte to be written A carriage return stops the write The carriage return is not written to the EEPROM EXAMPLE The command M0000FF W416243 CR will put the ASCII string AbC into bytes 0000FF through 0000102 of the EEPROM memory The next EEPROM read write address would be 0000103 after the execution of the example The CR was not written to the EEPROM With the LinkHub E the W command is fol...

Page 52: ...ending the command followed by more 9 600 baud data will often cause the device to reset and the speed to return to 9 600 baud NOTE The 1 Wire bus with relaxed timing for long lines can only process bits at a rate of about 14 000 bits per second bps If a user sends characters to the LINK faster than the 1 Wire protocol rate the device will drop characters and cause errors Streaming bytes using the...

Page 53: ... Sending the command followed by more 9 600 baud data will often cause the device to reset and the speed to return to 9 600 baud NOTE The 1 Wire bus with relaxed timing for long lines can only process bits at a rate of about 14 000 bits per second bps If a user sends characters to the LINK faster than the 1 Wire protocol rate the device will drop characters and cause errors Streaming bytes using t...

Page 54: ...Sending the command followed by more 9 600 baud data will often cause the device to reset and the speed to return to 9 600 baud NOTE The 1 Wire bus with relaxed timing for long lines can only process bits at a rate of about 14 000 bits per second bps If a user sends characters to the LINKTM faster than the 1 Wire protocol rate the device will drop characters and cause errors Streaming bytes using ...

Page 55: ...ta rate Sending the command followed by more 9 600 baud data will often cause the device to reset and the speed to return to 9 600 baud NOTE The 1 Wire bus with relaxed timing for long lines can only process bits at a rate of about 14 000 bits per second bps If a user sends characters to the LINKTM faster than the 1 Wire protocol rate the device will drop characters and cause errors Streaming byte...

Page 56: ...ure that the host program holds both DTR and RTS in the high state Many very small palm top computers generate serial signals that are as low as 3 volts which are not legal RS232 voltages These computers will NOT work with the LINKTM devices Desktop PCs and quality laptops will provide valid RS232 signal levels and more than enough power to operate the LINK device The LINKTM devices provide an aux...

Page 57: ...ter byte mode using b and address the ROM as before 6 Send the read command of BE a For The LinkHub S The LinkHub E and The LinkOEM send the read command of BE 7 Send two read commands as FFFF The echoed returned data will contain the temperature reading in Intel little endian order as a 16 bit signal integer may be formatted as four hex characters 8 Exit byte mode CR EXAMPLE The returned value wi...

Page 58: ... While the processor is idle the LED will illuminate at one second intervals The LED on the right side indicates the presence of 1 Wire bus traffic The LED will illuminate when there is 1 Wire traffic on any bus Figure 20 below shows the location of the ports and LED indicators on the LinkHub E The LinkHub S has two LED indicators on the right side The LED on the left is a heartbeat indicating tha...

Page 59: ...et Used with thanks to Lp for public domain image https commons wikimedia org wiki File RJ 45_TIA 568A_Left png media File RJ 45_TIA 568B_Left png Pin Connection Cable Color 1 No Connection White and Green 2 Auxiliary White and Orange 3 No connection Blue and White 4 1 Wire Data White and Blue 5 Auxiliary Orange and White 6 1 Wire Data Return Green and White Figure 20 Standard EIA TIA 568 B RJ 45 ...

Page 60: ...bles Used with thanks to Lp for public domain image https upload wikimedia org wikipedia commons 6 60 RJ 45_TIA 568B_Left png Pin Connection Cable Color 1 No Connection Orange and White 2 No Connection Orange 3 No Connection Green and White 4 1 Wire Data Blue 5 1 Wire Return White and Blue 6 Auxiliary Green 7 No Connection White and Brown 8 No Connection Brown Figure 21 Standard EIA TIA 568 B RJ 4...

Page 61: ... with thanks to Lp for public domain image https upload wikimedia org wikipedia commons 6 60 RJ 45_TIA 568B_Left png Pin Connection Cable Color 1 Ground Orange and White 2 5V Power Out Limited to 50mA Orange 3 No Connection Green and White 4 1 Wire Data Blue 5 Ground White and Blue 6 Auxiliary Green 7 No Connection White and Brown 8 No Connection Brown Figure 22 Standard EIA TIA 568 B RJ 45 Colors...

Page 62: ...e to the center post dimensions OD 5 5 mm ID 2 5 mm Length 11 8mm Nominal 12 V DC supply is required with an acceptable supply range of range of 9 15 volts DC A regulated supply is preferred A minimum supply current output of 250 mA is required with 500 mA recommended for additional power to 1 Wire network devices A 500 mA 12V DC supply with international certifications and various country AC powe...

Page 63: ...nual Version 1 6 iButtonLink LLC 2016 Page 63 Serial Standard Serial RJ 45 type connector LinkHub RJ 45 Jack DB9 F EIA Signal Name Pin Pin Signal Name GND 1 5 GND 232TX 2 3 TXD 232CTS 4 8 CTS 232RX 6 2 RXD 232DTR 7 2 DTR ...

Page 64: ...ard for cat 5 cable Used with thanks to Lp for public domain image https commons wikimedia org wiki File RJ 45_TIA 568A_Left png Pin Connection Cable Color 1 Return White and Green 2 V 12V Green 3 Switched 5V Aux White and Orange 4 Return Blue 5 1 Wire Data White and Blue 6 Return Orange 7 5V White and Brown 8 Return Brown Figure 25 Standard EIA TIA 568 B RJ 45 Colors ...

Page 65: ...al 12 V DC supply is required with an acceptable supply range of range of 9 15 volts DC A regulated supply is preferred A minimum supply current output of 250 mA is required with 500 mA recommended for additional power to 1 Wire network devices A 500 mA 12V DC supply with international certifications and various country AC power plugs is available from iButtonLink http www ibuttonlink com pages po...

Page 66: ...onnection Notes 1 Orange and White Ground 2 Orange 5V Unregulated and directly connected to the LinkHub power supply input 3 Green and White Ground 4 Blue 1 Wire Data 5 White and Blue 1 Wire Return 6 Green Switched 5 7 White and Brown 12V 400 mA maximum with standard power adapter at 25C maximum 250 mA max per 1 Wire port 8 Brown 5 Return Ground WARNING There is no current limiting provided on the...

Page 67: ...ted on 23 2 Vcc 5V repeated on 24 4 RB7 PGD used for programming Pic pin 23 5 RB6 PGC used for programming Pic pin 24 6 Master Clear used for programming and reset Pic pin 1 10 Auxiliary 11 Serial Receive Data 12 Vss Return 13 Vss Return 14 Serial Transmit Data X I2C Clock Pin 14 Rc3 SCK SCL Y I2C Data Pin 15 RC4 SDI SDA 23 OW Data repeated on 1 24 Vcc 5V repeated on 2 Figure 29 LinkOEM Pin Outs ...

Page 68: ...on of the FxBTM translator The FxBTM translator chip takes the FxBTM waveforms from the main communications bus and translates them into compatible 1 Wire waveforms The 1 Wire bus behind the translator can be a maximum of 4 inches long Translators are available in either chip level for inclusion in new packages or packaged for retrofitting existing slaves The LINKTM devices automatically recognize...

Page 69: ... a COM port number Follow these steps to determine the COM port number a Make sure that the LinkUSB is plugged in and that Windows has found a driver The driver should load automatically as it is included in the Windows distribution b Open Windows Explorer File Explorer c Right click on Computer My Computer or This PC and choose Manage d Click on Device Manager in the Computer Management applicati...

Page 70: ...re Viewer with Other Link Devices It should be noted that 1 Wire Viewer does not readily work with all Link devices It does not for example recognize the LinkHub S There is a trick to get around this but it requires also having a Link45 Set up a Link45 and plug it into a properly configured serial port Start 1 Wire Viewer 1 Wire Viewer will recognize the Link45 and initialize While 1 Wire Viewer i...

Page 71: ...g 14 Auxiliary Line High Impedance 15 Auxiliary Line High Power Low Impedance 16 Auxiliary Line Low Power Impedance 17 Bit Mode 19 Bit Mode with Strong Pull Up 20 Byte Mode 21 Byte Mode with Strong Pull Up 23 Display 25 Family Search First 27 Help for backslash Commands 29 Level Test 30 List of Available Commands 32 Low Level 33 Next 34 Pass Thru Mode 35 RAM Register States Dump 37 Read EEPROM ASC...

Page 72: ...ode 19 Bit Mode with Strong Pull Up 20 Byte Mode 21 Byte Mode with Strong Pull Up 23 Display 25 Level Test 30 List of Available Commands 32 Low Level 33 Next 34 Pass Thru Mode 35 Search Type 45 Sniffer Mode 47 Status of Bus Bus Reset 48 Turn Off Dynamic Pull Up 49 The LinkUSB 19 200 Baud Serial Port Data Rate 52 38 400 Baud Serial Port Data Rate 53 57 600 Baud Serial Port Data Rate 54 Arrival Depa...

Page 73: ... by all normal mode slaves present on the bus 60 240us A Arrival An arrival is reported after a new device s serial number with the correct CRC8 and a non zero family code appears on two subsequent full discovery passes ASCII Coding language B Break A break happens when the transmitter drives the line to a zero state for longer than is supported by the protocol This may happen because of a transmi...

Page 74: ...l of the voltage increase on the 1 Wire bus E EEPROM Electrically Erasable Programmable Read Only Memory H Hexadecimal Numeral system with base of 16 Uses 0 9 to represent zero to nine and A B C D E F to represent 10 15 I I O line Input output line L Link When seen after Commands Compatible With this refers to both the Link12 12i and Link45 45i The Link 12 12i is no longer being produced M Master ...

Page 75: ...kUSB can be up to 3 000 feet long This yields a logical 1 Wire network of 4 000 feet with four times the network weight of a standard 1 Wire bus Overshoot The Family First search command has started back at the beginning of the list of devices already found P Parasitic power A power supply for a device taken directly from the 1 Wire interface Presence pulse How a device shows that it is present on...

Page 76: ...us after the last bit of the first byte is issued T TTL Transistor transistor logic switches and maintains logic states through circuits built from bipolar transistors W Watchdog timer Protection device that resets unit if it fails to perform its action in the specified amount of time ...

Page 77: ... Version 1 5 Page 77 Revision History Date Revision Initials 7 07 16 Updated RJ 45 connection information and diagrams Updated Table of Contents SI 7 21 16 Added Appendix L Added revision history Updated Table of Contents SI ...

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