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ID Register
base + 00
15
14
h
Write
Read
Manufacturer ID - returns FFFF
Device Type
Register
base + 02
15
14
h
Write
Read
Status/Control
Register
base + 04
15
14
h
Write
undefined
Read
0
M
134 Register-Based Programming
There are eight relay registers driving the 256 channels of the Multiplexer
and two tree relay registers controlling the 21 tree relays. The second tree
relay control register also controls nine C relays used for signal routing. The
analog bus register controls five analog bus connection relays. All these
relay control registers are readable/writable (R/W) registers. Writing a "1"
to one bit will close the respective relay and writing a "0" will open the relay.
When power-on or reset the Multiplexer, all the control relays are open and
when you read from these registers, all the bits are zero.
Reading the ID register returns FFFF
Technologies and the module is an A16 register-based device.
13
12
11
10
Undefined
The "Programming Example" on page 141 shows how to read the ID
Register.
Reading the Device Type Register returns 026B
identifies the device as the Agilent E8462A 256-Channel Relay
Multiplexer.
13
12
11
10
The "Programming Example" on page 141 shows how to read the Device
Type Register.
Writing to the Status/Control Register (base + 04
disable/enable the interrupt generated when channels are closed or opened.
13
12
11
10
Set Interrupt Level
undefined
Interrupt Level
The "Programming Example" on page 141 shows how to read the Status
Register.
indicating the manufacturer is Agilent
h
9
8
7
6
in Agilent Technologies A16 only register-based card
h
9
8
7
6
Undefined
026B
, 619
h
10
9
8
7
6
D
B
D
5
4
3
2
Logical Address
(decimal = 619) which
h
5
4
3
2
) enables you to
h
5
4
3
2
undefined
undefined
1
1
1
0
1
0
1
0
SYS-
R
FAIL
SYS-
R
FAIL
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