82 Register-Based Programming
Appendix B
Register Descriptions
The Form C switch module contains two read registers, one read/write
register, and two write registers. This section describes each Form C
module register.
Reading and
Writing to the
Registers
Example programs are provided at the end of this appendix that show how
to read and write to these registers. You can read or write to the following
Form C switch module registers.
•
Manufacturer Identification Register (base + 00
16
) (read)
•
Device Type Register (base + 02
16
) (read)
•
Status/Control Register (base + 04
16
) (read or write)
•
Relay Control Register for Channels 00 - 15 (base + 06
16
) (write)
•
Relay Control Register for Channels 16 - 31 (base + 08
16
) (write)
Manufacturer
Identification
Register
The Manufacturer Identification Register is at offset address 00
16
and
returns FFFF
16
. This shows that Agilent Technologies is the manufacturer
and the module is an A16 register-based module. This register is read only.
Device Type
Register
The Device Type Register is at offset address 02
16
and returns 0121
16
for
an E1463A Form C Switch module. This register is read only.
Status/Control
Register
The Status/Control Register is at offset address 04
16
and informs the user
about the module’s status and configuration. This register is read and write.
b+00
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Write
Undefined
Read
Manufacturer ID - Returns
FFFF
16
= Agilent Technologies A16 only register-based device.
b+02
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Write
Undefined
Read
0121
16
b+04
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Write
Not Used
E
Not Used
R
Read
X
MS
Not Used
B
E
X
X
1
1
X
X
Summary of Contents for E1463A
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