HP VXI E1432A Bit, Bit, Bit, Bit, Err, Active, (HP’s ID), (1MB of A24), Register Definitions, HP E1432A User's Guide, The VXI Bus Registers are defined as follows:

HP E1432A User's Guide

Register Definitions

The VXI Bus Registers are defined as follows:

￿Id Register: A read of this 16 bit register provides information about the device’s configuration. Its value is always CFFF16 as defined in the following table.

Bit	15-14	13-12	11-0
Contents	11	00	111111111111
	(Register Based Device)	(A16/A24)	(HP’s ID)

￿Logical Address Register: A write to this register changes the device’s logical address according to the VXI Bus Dynamic Configuration protocol. Its format is defined in the following table.

Bit	15-8	7-0
Contents	No effect	Logical
		Address

￿Device Type Register: A read of this register provides information about the device’s configuration. Its format is defined in the following table.

Bit	15-12	11-0
Contents	0011	Model Code
	(1MB of A24)	(20116 for HP E1432A)

￿Status Register: A read of this register provides information about the device’s status as defined in the following table.

Bit

15

14

13-12

11

10

9

8

Contents

A24

MODID*

Unused

Block

Data

ST

Loaded

Active

Ready

Ready

Done

Bit

7

6

5

4

3

2

1

0

Contents

Done

Err*

Unused

HW

Ready

Passed

Q Resp

Cmd

OK

Ready

Ready

A24 Active: A one (1) in this field indicates that the A24 registers can be accessed. It reflects the state of the Control register’s A24 Enable bit.

MODID*: A one (1) in this field indicates that the device is not selected via the P2 MODID line. A zero (0) indicates that the device is selected by a high state on the P2 MODID line.

Unused: A read of these bits will always return zero (0).

Block Ready: A one (1) indicates that there is a block of data available to be read from the Send Data registers. A zero (0) indicates that less than a full block is available.

A-5