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Register Descriptions
Relay Multiplexer Registers
The READ Registers
ID Register
base + 00
15
14
16
Read
Device
Class
Device Class
Address Space
Appendix D
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This section describes the relay strain gage multiplexer and FET strain gage
multiplexer registers.
There are three READ and three WRITE registers on the relay strain gage
multiplexers.
The following READ registers are located on the relay strain gage
multiplexer.
•
ID Register (base + 00
•
Device Type Register (base + 02
•
Status Register (base + 04
The relay multiplexer's ID Register indicates the classification, addressing
mode, and the manufacturer of the device.
13
12
11
10
9
Address
Mode
Device Classification. Bits 15 and 14 classify a device as one of the
following:
0
0
memory device
0
1
extended device
1
0
message-based device
1
1
register-based device
The HP E1355A/E1356A multiplexers are register-based devices.
Addressing Mode. Bits 13 and 12 indicate the addressing mode used by
the device:
0
0
A16/A24 address mode
0
1
A16/A32 address mode
1
0
RESERVED
1
1
A16 address mode
The HP E1355A/E1356A Relay Strain Gage Multiplexers use the A16
address mode.
)
16
)
16
)
16
8
7
6
5
Manufacturer ID
Strain Gage Register-Based Programming
4
3
2
1
0
123
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