Specifications

Manufacturer
Identification
Manufacturer ID. Bits 11 through 0 identify the manufacturer of the
device. Hewlett-Packard’s ID number is 4095, which corresponds to bits
11 - 0 being set to "1".
Given the device classification, addressing space, and manufacturer of the
HP E1355A/E1356A multiplexers, reading the ID register returns FFFF
16
.
An example of how to read the ID Register is found in the “Programming
Examples” section later in this appendix.
Device Type
Register
The Device Type Register contains a model code which identifies the
device.
base + 02
16
1514131211109876543210
Read Model Code
Model Code Model Code. The following model codes identify the HP E1355A and
E1356A Relay Strain Gage Multiplexers. The model codes are set by the
card ID jumpers located on the E1345-66201 component assembly.
FF04
16
- HP E1355A 8-Channel 120Ω Relay Strain Gage Multiplexer
FF06
16
- HP E1356A 8-Channel 350Ω Relay Strain Gage Multiplexer
Status Register The relay strain gage multiplexer Status Register is monitored to determine
when the multiplexer has finished opening or closing a channel.
base + 04
16
1514131211109876543210
Read F F BSY1111111
BSY Busy. A one (1) in bit 7 indicates the relay multiplexer is ready to receive a
command. A zero (0) in bit 7 indicates the multiplexer is "busy" closing or
opening a channel.
124 Strain Gage Register-Based Programming Appendix D
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