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 E1357A/E1358A 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
module.
base + 02
16
1514131211109876543210
Read Model Code
Model Code Model Code. The following model codes identify the HP E1357A and
E1358A FET Strain Gage Multiplexers. The model codes are set by the
terminal module attached to the HP E1351-66201 component module, or by
the card ID switches on the component module.
FF14
16
- HP E1357A 8-Channel 120Ω FET Strain Gage Multiplexer
FF16
16
- HP E1358A 8-Channel 350Ω FET Strain Gage Multiplexer
Status Register The FET multiplexer Status Register indicates if interrupts are enabled, if an
interrupt has occurred, and if the multiplexer is busy closing or opening a
channel.
base + 04
16
1514131211109876543210
Read F F 1 1 1 BSY 1 1 IRQ IRQ
EN
IRQ EN Interrupt Request Enabled. A zero (0) indicates enabled, a one (1)
indicates disabled.
IRQ Interrupt Request. A zero (0) indicates an interrupt, a one (1) indicates no
interrupt. This bit remains one (1) if IRQ EN is disabled. Interrupt remains
set until Card Reset or interrupt has been acknowledged.
BSY Busy. This bit is set zero (0) during channel closing and the delay period.
Triggers will not be accepted. BSY is unasserted at the beginning of the
"channel closed" pulse. If a trigger occurs during the "channel closed"
pulse, the pulse is terminated and the channel is advanced. Operates only
with downloaded scan list (DIR is zero).
Appendix D Strain Gage Register-Based Programming 127
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com