Measurement-computing PC104-DAS16JR/12 Uživatelský manuál stáhnout pdf (Strana 19)

3.5 STATUS REGISTER

BASE ADDRESS + 8

CH1CH2CH4CH8INTMUXU/BEOC

01234567

A read mostly, one-function-write register.

READ

EOC = 1, the A/D converter is busy. EOC = 0, it is free.

U/B = 1, the amplifier is in Unipolar mode. U/B = 0, is bipolar.

MUX = 1, Channels are configured 16 single ended. MUX = 0, 8 differential.

INT = 1, an external pulse has been received. INT = 0, the flip-flop is ready to

receive a pulse..

There is a flip-flop on the TRIGGER input (pin 25) which will latch a pulse as short

as 200 nanoseconds. Once triggered, this flip-flop must be reset by a write to this

can be received.

CH8, CH4, CH2 & CH1 are a binary number between 0 and 15 indicating the channel

number that the MUX is currently set to and is valid only when EOC = 0. The

channel MUX increments shortly after EOC = 1 so may be in a state of transition

when EOC = 1. The binary weight of each bit is shown in the table above.

WRITE

A write of any data to this register resets the flip-flop on the pin 25 input and sets the

INT bit to 0.

1 2 ... 14 15 16 17 18 19 20 21 22 23 24 ... 31 32

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Measurement-computing PC104-DAS16JR/12 Uživatelský manuál Strana 19