LM3S9B81 Datasheet, PDF (1020/1155 Pages) Texas Instruments – Stellaris® LM3S9B81 Microcontroller

Signal Tables
Table 23-2. Signals by Pin Number (continued)
Pin Number
Pin Name
Pin Type Buffer Type^a Description
18
PG1
I/O
TTL
GPIO port G bit 1.
EPI0S14
I2C1SDA
I/O
TTL
EPI module 0 signal 14.
I/O
OD
I²C module 1 data.
U2Tx
O
TTL
UART module 2 transmit. When in IrDA mode, this signal has IrDA
modulation.
19
PG0
I/O
TTL
GPIO port G bit 0.
EPI0S13
I2C1SCL
I/O
TTL
EPI module 0 signal 13.
I/O
OD
I²C module 1 clock.
U2Rx
I
TTL
UART module 2 receive. When in IrDA mode, this signal has IrDA
modulation.
USB0EPEN
O
TTL
Optionally used in Host mode to control an external power source
to supply power to the USB bus.
20
VDD
-
Power Positive supply for I/O and some logic.
21
GND
-
Power Ground reference for logic and I/O pins.
22
PC7
I/O
TTL
GPIO port C bit 7.
C1o
O
TTL
Analog comparator 1 output.
C2-
I
Analog Analog comparator 2 negative input.
CCP0
I/O
TTL
Capture/Compare/PWM 0.
CCP4
I/O
TTL
Capture/Compare/PWM 4.
EPI0S5
I/O
TTL
EPI module 0 signal 5.
U1Tx
O
TTL
UART module 1 transmit. When in IrDA mode, this signal has IrDA
modulation.
USB0PFLT
I
TTL
Optionally used in Host mode by an external power source to
indicate an error state by that power source.
23
PC6
I/O
TTL
GPIO port C bit 6.
C2+
I
Analog Analog comparator 2 positive input.
C2o
O
TTL
Analog comparator 2 output.
CCP0
I/O
TTL
Capture/Compare/PWM 0.
CCP3
I/O
TTL
Capture/Compare/PWM 3.
EPI0S4
I/O
TTL
EPI module 0 signal 4.
U1Rx
I
TTL
UART module 1 receive. When in IrDA mode, this signal has IrDA
modulation.
USB0PFLT
I
TTL
Optionally used in Host mode by an external power source to
indicate an error state by that power source.
24
PC5
I/O
TTL
GPIO port C bit 5.
C0o
O
TTL
Analog comparator 0 output.
C1+
I
Analog Analog comparator 1 positive input.
C1o
O
TTL
Analog comparator 1 output.
CCP1
I/O
TTL
Capture/Compare/PWM 1.
CCP3
I/O
TTL
Capture/Compare/PWM 3.
EPI0S3
I/O
TTL
EPI module 0 signal 3.
USB0EPEN
O
TTL
Optionally used in Host mode to control an external power source
to supply power to the USB bus.
1020
Texas Instruments-Advance Information
June 29, 2010