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PCIe-24DSI32

_____________________________________________________________________________

General Standards Corporation Ph:(256)880-8787 FAX:(256)880-8788 Email: [email protected]

A-5

Table 3.5.2.2. Analog Input Data Coding; 16-Bit Data Field

DIGITAL

VALUE (Hex)

ANALOG INPUT LEVEL

OFFSET BINARY

TWO'S COMPLEMENT

Positive Full Scale minus 1 LSB

FFFFh

7FFFh

Zero plus 1 LSB

8001h

0001h

Zero

8000h

0000h

Zero minus 1 LSB

7FFFh

FFFFh

Negative Full Scale plus 1 LSB

0001h

8001h

Negative Full Scale

0000h

8000h

Table 3.5.3. Buffer Control Register

Offset: 0000 0020h

Default: 0X03 FFFEh *

BIT FIELD

MODE

DESIGNATION

FUNCTION

D[17..00]

R/W

BUFFER THRESHOLD

Buffer Flag Threshold (duplicated in the BCR)

D[18]

R/W

DISABLE BUFFER INPUT

Disables ADC inputs to the buffer

D[19]

R/W

CLEAR BUFFER **

Clears (empties) the buffer

D[21..20]

R/W

DATA WIDTH

Controls the width of the buffer data field as:

0 => 16 bits
1 => 18 bits
2 => 20 bits
3 => 24 bits.

D[23..22]

(Reserved)

---

D[24]

R/W

BUFFER OVERFLOW ***

Reports buffer overflow (Write on full)

D[25]

R/W

BUFFER UNDERFLOW ***

Reports buffer underflow (Read on empty)

D[31..26]

(Reserved)

---

* Changes to 0103 FFFEh when the buffer fills.

** Clears automatically. *** Clear by writing LOW, or by board reset.

Table 3.6.1.1. Channel Groups

INPUT CHANNELS

CHANNEL

GROUP

32-CHANNEL

BOARD

16-CHANNEL

BOARD

8-CHANNEL

BOARD

00-07

00-03

00,01

08-15

04-07

02,03

16-23

08-11

04,05

24-31

12-15

06,07

Содержание PCIe-24DSI32

Страница 1: ...______________________________ General Standards Corporation Ph 256 880 8787 FAX 256 880 8788 Email solutions GeneralStandards com Rev 042514 PCIe 24DSI32 24 BIT 32 CHANNEL DELTA SIGMA 200 KSPS ANALOG...

Страница 2: ...and Synchronization 2 4 2 4 1 Interboard Connections 2 4 2 4 2 Multiboard Synchronization 2 5 2 5 Maintenance 2 5 2 6 Reference Verification and Adjustment 2 5 2 6 1 Equipment Required 2 6 2 6 2 Adjus...

Страница 3: ...6 2 2 Legacy Rate Generator 3 14 3 6 3 Direct External Clocking 3 14 3 6 4 Harmonically Locked Channels 3 15 3 6 5 Channel Synchronization 3 15 3 6 6 Multiboard Operation 3 15 3 6 6 1 External Sample...

Страница 4: ...ata Registers 3 1 3 2 Board Control Register 3 2 3 3 1 Configuration Operations 3 3 3 4 Analog Input Function Selection 3 4 3 4 3 Analog Input Range Selection 3 4 3 5 2 Input Data Buffer Organization...

Страница 5: ...ts consist of 3 3 VDC in accordance with the PCI specification and operation over the specified temperature range is achieved with minimal 200 LFPM air cooling Specific details pertaining to physical...

Страница 6: ...ns and autocalibration Gain and offset trimming of the input channels is performed by applying correction values obtained during autocalibration PCI Conn I O Conn Analog Inputs 32 Diff Input Configura...

Страница 7: ...et is located in the slot position remove the bracket Then remove the board from the shipping envelope and position the board with the panel bracket oriented toward the expansion panel opening Align t...

Страница 8: ...INPUT RETURN 16 INPUT RETURN 17 INPUT CH 00 LO 17 INPUT CH 19 LO 18 INPUT CH 00 HI 18 INPUT CH 19 HI 19 INPUT CH 01 LO 19 INPUT CH 20 LO 20 INPUT CH 01 HI 20 INPUT CH 20 HI 21 INPUT CH 02 LO 21 INPUT...

Страница 9: ...Inputs Differential operation is essential when the input source returns are at different potentials This operating mode also offers the highest rejection of the common mode noise that is characteris...

Страница 10: ...n Analog input converters on multiple boards can be a Clocked from a single clock source Multiboard clocking and or b Synchronized to a common time reference Multiboard synchronization Clocking multip...

Страница 11: ...nd also selects the channels on each board that will respond to the daisy chained clock Although only software designated channels respond to the daisy chained clock all channels on all target boards...

Страница 12: ...r 5 1 2 digit 0 005 accuracy for DC voltage measurements at 10 Volts Hewlett Packard 34401A Host system with PCIe expansion slot Cable connector with test leads Not required if calibration test points...

Страница 13: ...1 Connect the digital multimeter between the VTEST OUTPUT and VTEST RETURN pins in the system I O connector Refer to Table 2 2 2 for pin assignments 2 If power has been removed from the board apply po...

Страница 14: ...00 R W Board Control BCR 0000 383Ch Board Control Register BCR 04 R W Nref PLL Control 0000 01F4h PLL reference oscillator control integer PLL configuration only 08 R W Nvco PLL Control Legacy Nrate...

Страница 15: ...INTERRUPT A0 Interrupt event selection Default is zero D09 R W INTERRUPT A1 D10 R W INTERRUPT A2 D11 R W INTERRUPT REQUEST FLAG Set HIGH when the board requests an interrupt Clears the request when cl...

Страница 16: ...PCIe interrupts disabled Attempts to access the local bus during configuration should be avoided until the PCIe interrupts are enabled and the initialization complete interrupt request is asserted 3...

Страница 17: ...rify the accuracy of any or all input channels by replacing the system input connections with either a precision internal reference voltage VREF or a zero reference ZERO The VREF test produces a posit...

Страница 18: ...cs Analog input samples accumulate in the analog input data FIFO data buffer which has a capacity of 256K 262 144 data values Data accumulates in the buffer until extracted by the PCI bus from a singl...

Страница 19: ...e 5V range Negative Full Scale is the negative equivalent of positive full scale Full scale Range FSR is the total input voltage range For 16 Bit data one LSB equals the full scale range divided by 65...

Страница 20: ...UT control bit is active in the BCR When this bit is set HIGH the threshold flag is routed to the AUX LVDS OUT output in the system I O connector 3 5 3 2 Buffer Clearing and Disabling Asserting the CL...

Страница 21: ...ed either from an adjustable internal rate generator or from a single external hardware clock as shown in Figure 3 6 1 1 Input channels are arranged into four groups Table 3 6 1 1 three of which can b...

Страница 22: ...Z Nvco Nref PLL Oscillator Mode Decode Rate Divisor Ndiv ADC Sample Clock Ch 00 31 Rate Gen Out Chan 00 Clock Initiator Local ADC Sync Ext Sync Output Target Initiator Internal Clocking Rate Assign 0...

Страница 23: ...t Codes ASSIGNMENT CODE GROUP 0 ASSIGNMENT GROUPS 1 3 ASSIGNMENT 0 Internal Rate Generator Unused 1 Reserved Unused 2 Reserved Unused 3 Reserved Unused 4 External Sample Clock as rate generator input...

Страница 24: ...a stable reference frequency Older Legacy versions of this product implement a rate generator that could be adjusted with 0 2 percent resolution The higher resolution PLL configuration however provide...

Страница 25: ...ect the lowest possible values for Nvco and Nref Because specific applications might require custom values for Fref an approximate measurement of the installed PLL reference oscillator frequency is av...

Страница 26: ...me factors and simplify the fraction by canceling all factors that are duplicated in the numerator and denominator 3 Select a value for DIVISOR that adjusts the value of the fraction to between 0 61 a...

Страница 27: ...starts by selecting a maximum value for DIVISOR from Ndiv in Equation 3 1 and then selects successively smaller values of Ndiv until valid values for both Ndiv and Nrate produce a value for Fsamp tha...

Страница 28: ...ion of the synchronization sequence is indicated by the CHANNELS READY flag in the BCR undergoing a Low to High transition Paragraph 3 4 4 The CHANNELS READY transition can be selected as a condition...

Страница 29: ...rnal clock NOTE The INITIATOR control bit controls only the sources of the external clock and sync output signals and has no other effect Multiple boards can all be configured as initiators and operat...

Страница 30: ...rs the AUTOCAL PASS status flag in the BCR will be LOW when the autocal sequence is completed A HIGH state for AUTOCAL PASS indicates that autocalibration was successful To ensure full conformance to...

Страница 31: ...1 Interrupt Event Selection INTERRUPT A 2 0 INTERRUPT EVENT CONDITION 0 Initialization completed Default state 1 Autocal completed 2 Channels Ready 3 Data Buffer threshold flag LOW to HIGH transition...

Страница 32: ...08h A8h D7 0 DMA Command Status Command and Status Register 01h 03h See Text Determined by specific transfer requirements 3 9 2 Demand Mode Demand mode transfers are controlled in a manner similar to...

Страница 33: ...Note References to channel synchronization in this manual pertain to the situation in which the sampling of all input channels occurs simultaneously Scan synchronization refers to the synchronization...

Страница 34: ...chronized mode and the sample clock settings for Group 1 through Group 3 are ignored Disabled groups remain disabled Use the following sequence to scan synchronize multiple boards Paragraph 3 6 3 Sync...

Страница 35: ...e allows a burst to be initiated externally through the AUX I O pins in the system I O connector regardless of the selected rate assignment Paragraph 3 6 1 2 This feature is available with firmware re...

Страница 36: ...hange Transitioning into or out of a selftest mode or out of autocalibration A system or local reset Power application The settling time required to reestablish specified performance depends upon the...

Страница 37: ...PCIe 24DSI32 _____________________________________________________________________________ General Standards Corporation Ph 256 880 8787 FAX 256 880 8788 Email solutions GeneralStandards com 3 24...

Страница 38: ...s including autocalibration PCI Conn I O Conn Analog Inputs 32 Diff Input Configuration Switches PCI Interface Adapter Voltage Reference V Test Out Sample Rate Generator s Local Controller Input Data...

Страница 39: ...l controller then attaches a 5 bit channel tag to the data word applies offset and gain correction factors and finally transfers the corrected data to the input data buffer Antialias filtering is prov...

Страница 40: ...Boards that receive and retransmit the external clock are clock targets Multiple targets can be controlled from a single initiator 4 5 Power Control Regulated supply voltages of 5 Volts 6 Volts and 1...

Страница 41: ...________________________________________________________________________ General Standards Corporation Ph 256 880 8787 FAX 256 880 8788 Email solutions GeneralStandards com A 1 APPENDIX A LOCAL REGIST...

Страница 42: ...01F4h PLL vco control integer Nrate for the legacy rate generator 0C R W Rate Assignments 0000 0000h ADC Clock source Group disables 10 R W Rate Divisor 0000 0005h Sample rate divisor 14 RO Reserved...

Страница 43: ...sts an interrupt Clears the request when cleared LOW by the bus D12 RO AUTOCAL PASS Set HIGH at reset or autocal initialization Cleared LOW if autocalibration terminates unsuccessfully D13 RO CHANNELS...

Страница 44: ...3 4 Analog Input Function Selection AIM 0 FUNCTION OR MODE 0 Differential analog input mode 1 Reserved 2 ZERO test Internal ground reference is connected to all analog input channels 3 VREF test Inter...

Страница 45: ...T FIELD MODE DESIGNATION FUNCTION D 17 00 R W BUFFER THRESHOLD Buffer Flag Threshold duplicated in the BCR D 18 R W DISABLE BUFFER INPUT Disables ADC inputs to the buffer D 19 R W CLEAR BUFFER Clears...

Страница 46: ...DISABLE 2 D 15 12 GROUP 3 ENABLE DISABLE 3 D 31 16 Reserved Table 3 6 1 2 2 Rate Generator Assignment Codes ASSIGNMENT CODE GROUP 0 ASSIGNMENT GROUPS 1 3 ASSIGNMENT 0 Internal Rate Generator Unused 1...

Страница 47: ...fset 0008h Default 0000 01F4h BIT FIELD MODE DESIGNATION FUNCTION D 09 00 R W VCO FACTOR Nvco PLL VCO factor 30 1000 D 31 10 R W Reserved Table 3 6 2 1 3 Summary of PLL Sample Rate Control Parameters...

Страница 48: ...ady 3 Data Buffer threshold flag LOW to HIGH transition 4 Data Buffer threshold flag HIGH to LOW transition 5 Reserved 6 Reserved 7 Reserved Table 3 9 1 Typical DMA Register Configuration DMA Channel...

Страница 49: ...SAMPLE EVENT NON SYNCHRONIZED SCANS Typical SYNCHRONIZED SCANS Tn 34567012 01234567 Tn 1 56701234 01234567 Tn 2 01234567 01234567 Tn 3 45670123 01234567 Tn 4 12345670 01234567 Table 3 11 1 Board Conf...

Страница 50: ...pose Although extensive editing and reviews are performed before release to ECO control General Standards Corp assumes no responsibility for any errors that may exist in this document No commitment is...

Страница 51: ...General Standards Corporation Ph 256 880 8787 FAX 256 880 8788 Email solutions GeneralStandards com Web Site http www GeneralStandards com MAN PCIe 24DSI32...

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