Measurement-computing CIO-DAS16/330 Instrukcja Użytkownika Pobierz pdf (Strona 13)

Table 4-1. Bit Weights

801287

40646

20325

10164

883

442

221

110

HEX VALUEDECIMAL VALUEBIT POSITION

To write control or data to a register, the individual bits are set to 0 or 1 then combined to form a Byte. The method of

programming required to set/read bits from bytes is beyond the scope of this manual.

The board registers and their function are listed on Table 4-2.

Table 4-2. Register Functions

Advanced features counter control

(8254)

None. No read back on 8254BASE + 19

CTR 2. Pre-trigger counterPre-trigger countBASE + 18

CTR 1. Total counter (1/2)Total sample LS CounterBASE + 17

CTR 0. Total counter (1/2)Total sample MS CounterBASE + 16

Upper nibble, enhanced features

control

Upper nibble, enhanced features

status

BASE + 11

ENHANCED MODE ONLY

Pacer Clock Control (8254)None. No read back on 8254BASE + 15

CTR 2 Data - A/D PacerCTR2 Data - A/D Pacer ClockBASE + 14

CTR 1 Data - A/D PacerCTR 1 Data - A/D Pacer ClockBASE + 13

Counter 0 DataCounter 0 DataBASE + 12

Gain, Enhanced Mode, DT Conn.Gain setting read-backBASE + 11

Pacer clock control registerNoneBASE + 10

Set DMA, INT etcDMA, Interrupt & Trigger ControlBASE + 9

NoneStatus EOC, UNI/BIP, Current Ch.BASE + 8

NoneNoneBASE + 7

NoneNoneBASE + 6

NoneNoneBASE + 5

NoneNoneBASE + 4

Digital 4 Bit OutputDigital 4 Bit InputBASE + 3

Channel MUX Set, Clear FIFOChannel MUXBASE + 2

NoneA/D Bits 1 (MSB) - 8BASE + 1

Start A/D ConversionA/D Bits 9-12 (LSB) & Channel #BASE

WRITE FUNCTIONREAD FUNCTION - ALL MODESADDRESS

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 33 34

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