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      HAC-UM Series RF Module Manual          SHENZHEN HAC TECHNOLOGY CO., LTD.

 

FAX:+86-755-23981077 23981079             

- 8 -

                                                            www.rf-module-china.com

 

HAC-UM  standard  transceivers  offer  transparent  protocol  to  support  various  applications  and 

protocols of users. If the user needs to decrease his cost or ease the workload of terminal CPU, 

we can add other specific functions based on the transparent protocol, such as addressing, data 

acquisition, command interpretation, etc. 

 

6.

 

Sleep function instruction: 

Due  to  reducing  more  consumption,  HAC-UM  transceivers  support  Sleep  function.  In  sleep 

mode, the current consumption is less than 5

µ

A.   

The  default  set  of  sleep  function  is  usually  closed  to  ensure  the  reliability  of  preventing 

transceivers from getting in wrong sleep mode. The sleep function can be opened by HAC after 

informed or by user via programming them software. 

a. How to use the Sleep function: 

The Pin8 

SLP

 in JP1 is the signal of sleep control. In high power level, when the transceiver 

stays in sleep mode, the  conversion from idle mode to sleep will be finished in 1ms. The SLP 

signal  can  convert  transceiver  from  idle  to  sleep  mode  in  1ms  after  rising  edge.  If  the  Sleep 

signal arrives when the transceiver is transmitting data, the module will enter sleep mode after 

finishing transmission. From sleep mode to idle, it takes the transceiver 10ms after falling edge. 

To disable the sleep function of HAC-UM, the SLP (SLEEP) pin should be definitely connected 

with 0 or ground. 

b. Attentions about use of sleep function:   

When the sleep function enabled, any supply glitches, such as switch dithering, fire striking or 

quick switching on and off, could cause the transceiver to be switched to the wrong sleep mode. 

After switching on, users can avoid this error by making a compulsive restoration once after the 

CPU delays 100ms. But such a condition occurs seldom. 

c. Sleep Time Diagram: 

                   
 
 
 
 
 
 
 
 

 

 

Summary of Contents for UM Series

Page 1: ...HAC TELECOM TECHNOLOGY CO LTD Address Fl 6 Building 2 Jiuxiangling New Industry Park No 4227 Xilihu Road Nanshan Shenzhen China Tel 86 755 23981078 23981077 Fax 86 755 23981007 E mail webmaster rf mo...

Page 2: ...55 23981077 23981079 2 www rf module china com Catalogue I Features of HAC UM Series 3 II Applications of HAC UM Series 4 III How to use HAC UM Series 4 IV Networking Application of HAC UM Series 13 V...

Page 3: ...200bps When the baud rate is 4800bps it is more than 700m When the baud rate is 9600bps it is more than 500m 5 Transparent data transmission Transparent data interface used in transceivers is for meet...

Page 4: ...gh reliability small and light By using monolithic radio frequency integrated circuit and single chip MCU the transceivers have less peripheral circuits high reliability and low failure rate 12 More o...

Page 5: ...ice in the system equipment In case of failing to connect with the ground it can form its own grounding but must be absolutely separated from the municipal electric supply If lower power for lower pow...

Page 6: ...mper wire JP2 on the upper right corner of HAC UM defined as ABCDE respectively Assuming the open circuit of jumper wire without short circuiter is mode 1 and short circuit of jumper wire with short c...

Page 7: ...nal equipment through serial port COM1 and COM2 output simultaneously i e if the user connects one device at COM1 and COM2 respectively they both can receive the data simultaneously ii For the data tr...

Page 8: ...them software a How to use the Sleep function The Pin8 SLP in JP1 is the signal of sleep control In high power level when the transceiver stays in sleep mode the conversion from idle mode to sleep wil...

Page 9: ...orward Error Correction or other correction algorithm when RxD of a HAC UM transceiver A receives the data then transmits it the other one transceiver B will have a delay ts to receive and transmit by...

Page 10: ...actual transmission BER Bit Error Rate is 10 4 1 packet with 1KB data which is about 10 thousand bits is sent theoretically at least 1 bit will be received wrongly then the 1KB information will never...

Page 11: ...on Many appropriative antennas for ultra low power RF modules are selected for meeting different user antenna configurations Please ask our Sales office for further information about the antenna s dim...

Page 12: ...antenna with folding joint easy for adjusting the direction and fixing iii LX433 3 SMA 35mm SMA helical antenna with magnetic core small size beautiful appearance like the mobile phone antenna b SMT...

Page 13: ...tion is controlled by master station that uses data frames containing address code to transmit data or command Slave station will receive all of the data and command and compare the received address c...

Page 14: ...9600bps under 10 2 BER Bandwidth 12 5K 1200bps 100K 9600bps Interface data format 8E1 8N1 Transmit current 42mA Receive current 32mA Sleep current 5 A Working humidity 10 90 relative humidity without...

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