Register Definitions B
E6198B Switch/Load Unit User Manual B-57
Pin Matrix Card Register Definition
Registers for the various load cards are defined in the following
tables. Each register is designated a W (Write-only) or R
(Read-only). The h subscript indicates a hexadecimal number.
Agilent E8792A and E8793A Pin Card Register Definitions
For relays, writing a 1 closes the relay, writing a 0 opens the
relay. Register read back for the relay states is not provided.
Thus, state tracking must be done in software.
Card Type (R)Base + 0
h
Returns the pin card type:
• Agilent E8792A returns a card type of 10
10
: (dddd = 1010).
• Agilent E8793A returns card type of 11
10
: (dddd = 1011).
Card Configuration (R) Base + 1
h
Pin card configuration register and firmware revision (FWR)
register. Initial firmware revision = 0
h
.
Status and Control (Read/Write) Base + 2
h
Status and Control Register provides applicable features from
the Agilent E6172 VXI card; register offset 4
h
:
Read Only:
• Busy~: 0 indicates busy, 1 indicates not busy.
Write and Read Bits:
• Manual: 0 to set column relay control to automatic, 1 to
set column relay control to manual.
Bits 76543210
Read
0000dddd
Bits76543210
Read
FWR
3
FWR
2
FWR
1
FWR
0
1111
Bits 7 6 5 4 3 2 1 0
Read
Busy~ Manual OAR IsensRly DAC2Rly DAC1Rly GndRly Reset
Write x Manual OAR IsensRly DAC2Rly DAC1Rly GndRly Reset
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