© National Instruments
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A-3
Port<0..1>_Tx_
Disable
Out
Async
When high, this output shuts
down the transmitter optical
transmitter. When low,
operation is enabled.
Port<0..1>_Rs<0..1>
Out
Async
Rate selection pins.
Port<0..1>_SCL
In/Out
Async
Bidirectional serial clock signal
for the two-wire communication
interface on the Port <0..1>
connector.
Valid values:
0
and
Z
(open
drain).
This signal is also called
MODDEF1.
Port<0..1>_SDA
In/Out
Async
Bidirectional serial data signal
for the two-wire communication
interface on the Port <0..1>
connector.
Valid values:
0
and
Z
(open
drain).
This signal is also called
MODDEF2.
Port<0..1>_
MacAddress
In
Async
Unique 48-bit MAC address
assigned to Port<0..1>. Use this
address when implementing a
network interface controller on
Port<0..1>.
Port<0..1>_
MacAddressValid
In
Async
When asserted, this signal
indicates that
Port<0..1>_MacAddress is
valid.
Table A-1.
NI-7932R CLIP Signals (Continued)
Port
Direction
Clock Domain
Description