HP E1432A User's Guide

Register Definitions

￿DSP Command Register: This register is used to assert VXI interrupts and toggle various status register bits. Many of the bits in this register are grouped into related Clock and Value pairs. This allow the bits to be modified independently with single register writes. In order to change an output value, the Clock bit must be written as a one (1), while the Value is written as the desired output value. Writing the Clock bit as a zero (0) will not change the output state. The current state is read from the Value bit.

The DSP Command register has the following format:

Bit

31-24

 

23

 

22

 

21

 

 

20

 

19

 

 

18

 

17

 

16

 

 

 

 

 

FIFO

 

FIFO

 

FIFO

 

 

FIFO

 

DONE

 

DONE

ERRn

ERRn

Contents

 

Unused

 

Enable

 

Enable

 

In

 

 

In

 

 

 

 

 

 

 

 

 

Clock

 

Value

Clock

Value

 

 

 

 

 

Clock

 

Value

 

Clock

 

Value

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Bit

 

15

 

 

14

 

 

13

 

 

12

 

 

11

 

10

 

9-8

 

7-0

 

 

Q Resp

 

Q Resp

 

Cmd

 

 

Cmd

 

 

IRQ

 

 

IRQ

 

 

 

 

Contents

 

Ready

 

Ready

 

Ready

 

Ready

 

Enable

 

Enable

 

Unused

 

IRQ7-0

 

 

Clock

 

Value

 

Clock

 

Value

 

 

Clock

 

Value

 

 

 

 

A-16