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Appendix B
Agilent E1364A Form C Switch Registers
Register Definitions
The Agilent E1364A Form C Switch is a register-based device.
See Figure B-1 for register definitions.
ID Register
b + 00
16
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Write
Undefined (Logical Address)
Read*
Reg-Base A16 Manufacturer ID
* Returns FFF
16
= Agilent A16 only register-based
Device Type Register
b + 02
16
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Write
Undefined
Read*
1 (A16 only) Module ID Code
* Returns: FF20
16
= 16-Channel Form C Switch
Status/Control Register
b + 04
16
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Write*
Undefined
Read**
FF
16
B7F
16
* R = Switch reset to power-on state (all switches open)
** B = Status "busy" is true low in bit #7 (FF7F
16
)
Channel Enable Register
b + 08
16
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Write*
CH15 CH14 CH13 CH12 CH11 CH10 CH9 CH8 CH7 CH6 CH5 CH4 CH3 CH2 CH1 CH0
Read
Always Returns FFFF
16
Write "1" closes channel, write "0" opens channel
(close = connect NO to C, open = connect NC to C)
Figure B-1. Form C Switch - Register Definitions
Appendix B Agilent E1364A Form C Switch Registers 65