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Register Definitions
Base +00
15
16
Write
Read*
Reg-Base
Base +02
15
16
Write
Read*
1 (A16 only)
Base +04
15
16
Write*
Read**
Base +06
15
16
Write*
Read
Base +08
15
14
16
Write*
CH15 CH14 CH13 CH12 CH11 CH10 CH09 CH08 CH07 CH06 CH05 CH04 CH03 CH02 CH01 CH00
Read
Appendix B
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The 16-Channel Relay Multiplexer Modules are register-based devices. See
Figure B-3
for register definitions.
ID Register
14
13
12
11
10
Undefined
A16
* Returns FFFF
16
Device Type Register
14
13
12
11
10
* Returns: FF00
16
FF01
=16-Channel High Voltage Relay Multiplexer (E1343A)
16
FF02
=16-Channel Thermocouple Relay Multiplexer (E1347A)
16
FF03
=16-Channel Thermocouple High Voltage Relay Multiplexer (E1344A)
16
Status/Control Register
14
13
12
11
10
* R =Multiplexer reset to power-on state (all switches open)
** B =Status "busy" is true low in bit #7 (FF7F
Tree Switch Register
14
13
12
11
10
Undefined
* Write "1" closes switch, write "0" opens switch
Channel Registers
13
12
11
10
* Write "1" closes channel, write "0" opens channel
Figure B-3. Multiplexer Register Definitions
9
8
7
6
5
(Logical Address)
Manufacturer ID
=Hewlett-Packard A16 only register-based
9
8
7
6
5
Undefined
Module ID Code
=16-Channel Relay Multiplexer (E1345A)
9
8
7
6
5
Undefined
B
16
9
8
7
6
5
Always returns FFFF
16
9
8
7
6
5
Always returns FFFF
16
16-Channel Relay Multiplexer Registers
4
3
2
1
0
4
3
2
1
0
4
3
2
1
0
R
)
4
3
2
1
0
93
92
91
90
4
3
2
1
0
83
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