SMC Networks SMC91C95 - Manual (Page 16)

16
DESCRIPTION OF PIN FUNCTIONS
PIN NO. NAME SYMBOL TYPE DESCRIPTION
125
126
AUI Collision COLP
COLN Diff. Input AUI collision differential inputs. A collision is
indicated by a 10 MHz signal at this input pair.
121
122
TPE Receive TPERXP
TPERXN Diff. Input 10BASE-T receive differential inputs.
4
6
TPE
Transmit TPETXP
TPETXN Diff. Output Internal ENDEC - 10BASE-T transmit
differential outputs.
5
7
TPE
Transmit
Delayed TPETXDP
TPETXDN Diff. Output 10BASE-T delayed transmit differential
outputs. Used in combination with TPETXP
and TPETXN to generate the 10BASE-T
transmit pre-distortion.
114 Powerdown PWRDWN I with pullup Internal ENDEC - Powerdown input. It keeps
the SMC91C95 in powerdown mode when
high (open). Must be low for normal operation.
Refer to the Powerdown Matrix following for
further details.
Transmit
Clock TXCLK External ENDEC - Transmit clock input from
external ENDEC
99 nWakeup
Enable nWAKEUP-
EN
I with pullup Input. When pulled down, the device will
enable Magic Packet (MP) logic and put the
Ethernet function in powerdown mode. The
pin assertion will override the state of
WAKEUP_EN and PWRDN bits in CTR,
Pwrdwn bit in ECSR, and Enable Function bit
ECOR. When deasserted, the WAKEUP_EN
and PWRDN bits will be changed to (0),
Pwrdwn to (0), and Enable Function to (1).
100 Wakeup WAKEUP O4 Output. Asserted high if nWAKEUP_EN is
asserted and a valid Magic Packet (MP)
pattern is detected. The pin remains asserted
until nWAKEUP_EN is deasserted.
118 Bias
Resistor RBIAS Analog Input A 22 kohm 1% resistor should be connected
between this pin and analog ground.