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Register Definitions
b+00
15
14
13
16
Write
Read*
RegBas
* Returns FFFF
= Hewlett-Packard A16 only Register-based
16
b+02
15
14
13
16
Write
Read*
1 (A16 only)
*Returns FF24
16
b+04
15
14
13
16
Write*
Read**
* R is matrix reset (all channels open); ** Status "busy"is low true in bit #7 (FF7F
b+08
15
14
13
16
Write*
33
23
13
Read
* Write "1" to close channel, "0" to open channel. First number in Write is row, second is column (e.g., for bit
#11, 3 = row 3 and 2 = column 2). All combinations are allowed (all rows and columns can be connected).
Appendix B
HP E1361A Relay Matrix Registers
The HP E1361A 4 X 4 Relay Matrix is a register-based slave device.
See Figure B-1 for register definitions.
ID Register
12
11
10
Undefined
A16
Device Type Register
12
11
10
Status/Control Register
12
11
10
FF
16
Channel Enable Register
12
11
10
03
32
22
12
Always returns FFFF
Figure B-1. Relay Matrix - Register Definitions
9
8
7
6
Manufacturer ID
9
8
7
6
Undefined
Module ID Code
9
8
7
6
Undefined
B
9
8
7
6
02
31
21
16
HP E1361A Relay Matrix Registers 64
Appendix B
5
4
3
2
Undefined
5
4
3
2
5
4
3
2
7F
16
)
16
5
4
3
2
11
01
30
20
1
0
1
0
1
0
R
1
0
10
00
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