Table 17-1. Signals by Pin Number (continued)
DescriptionBuffer Type
a
Pin TypePin NamePin Number
Ethernet PHY XTALP 25-MHz oscillator crystal input or external
clock reference input.
TTLIXTALPPHY16
Ethernet PHY XTALN 25-MHz oscillator crystal output. Leave
unconnected when using a single-ended 25-MHz clock input
connected to the XTALPPHY pin.
TTLOXTALNPHY17
GPIO port G bit 1.TTLI/OPG118
GPIO port G bit 0.TTLI/OPG019
Positive supply for I/O and some logic.Power-VDD20
Ground reference for logic and I/O pins.Power-GND21
No connect. Leave the pin electrically unconnected/isolated.--NC22
No connect. Leave the pin electrically unconnected/isolated.--NC23
No connect. Leave the pin electrically unconnected/isolated.--NC24
No connect. Leave the pin electrically unconnected/isolated.--NC25
GPIO port A bit 0.TTLI/OPA026
UART module 0 receive. When in IrDA mode, this signal has IrDA
modulation.
TTLIU0Rx
GPIO port A bit 1.TTLI/OPA127
UART module 0 transmit. When in IrDA mode, this signal has IrDA
modulation.
TTLOU0Tx
GPIO port A bit 2.TTLI/OPA228
SSI module 0 clock.TTLI/OSSI0Clk
GPIO port A bit 3.TTLI/OPA329
SSI module 0 frame.TTLI/OSSI0Fss
GPIO port A bit 4.TTLI/OPA430
SSI module 0 receive.TTLISSI0Rx
GPIO port A bit 5.TTLI/OPA531
SSI module 0 transmit.TTLOSSI0Tx
Positive supply for I/O and some logic.Power-VDD32
Ground reference for logic and I/O pins.Power-GND33
GPIO port A bit 6.TTLI/OPA634
Capture/Compare/PWM 1.TTLI/OCCP1
No connect. Leave the pin electrically unconnected/isolated.--NC35
VCC of the Ethernet PHY.Power-VCCPHY36
RXIN of the Ethernet PHY.AnalogIRXIN37
Positive supply for most of the logic function, including the
processor core and most peripherals.
Power-VDD2538
Ground reference for logic and I/O pins.Power-GND39
RXIP of the Ethernet PHY.AnalogIRXIP40
12.4-kΩ resistor (1% precision) used internally for Ethernet PHY.AnalogIERBIAS41
GND of the Ethernet PHY.Power-GNDPHY42
TXOP of the Ethernet PHY.AnalogOTXOP43
Positive supply for I/O and some logic.Power-VDD44
Ground reference for logic and I/O pins.Power-GND45
June 22, 2010462
Texas Instruments-Production Data
Signal Tables