LM3S2139 Datasheet, PDF (599/652 Pages) Texas Instruments – Stellaris® LM3S2139 Microcontroller

Stellaris^® LM3S2139 Microcontroller
Table 17-7. Signals by Function, Except for GPIO (continued)
Function
Pin Name Pin Number Pin Type Buffer Type^a
Description
CMOD0
E11
I
TTL
CPU Mode bit 0. Input must be set to logic 0
(grounded); other encodings reserved.
System Control &
Clocks
CMOD1
OSC0
B10
I
TTL
CPU Mode bit 1. Input must be set to logic 0
(grounded); other encodings reserved.
L11
I
Analog Main oscillator crystal input or an external clock
reference input.
OSC1
M11
O
Analog Main oscillator crystal output. Leave unconnected
when using a single-ended clock source.
RST
H11
I
TTL
System reset input.
U0Rx
L3
I
TTL
UART module 0 receive. When in IrDA mode, this
signal has IrDA modulation.
UART
U0Tx
U1Rx
M3
O
TTL
UART module 0 transmit. When in IrDA mode, this
signal has IrDA modulation.
H2
I
TTL
UART module 1 receive. When in IrDA mode, this
signal has IrDA modulation.
U1Tx
H1
O
TTL
UART module 1 transmit. When in IrDA mode, this
signal has IrDA modulation.
a. The TTL designation indicates the pin has TTL-compatible voltage levels.
17.2.4 GPIO Pins and Alternate Functions
Table 17-8. GPIO Pins and Alternate Functions
IO
Pin Number
PA0
L3
PA1
M3
PA2
M4
PA3
L4
PA4
L5
PA5
M5
PA6
L6
PA7
M6
PB0
E12
PB1
D12
PB2
C11
PB3
C12
PB4
A6
PB5
B7
PB6
A7
PB7
A8
PC0
A9
PC1
B9
PC2
B8
PC3
A10
PC4
L1
Multiplexed Function
U0Rx
U0Tx
SSI0Clk
SSI0Fss
SSI0Rx
SSI0Tx
CCP1
CCP4
CCP0
CCP2
I2C0SCL
I2C0SDA
C0-
C1-
C0+
TRST
TCK
TMS
TDI
TDO
CCP5
Multiplexed Function
SWCLK
SWDIO
SWO
June 18, 2012
599
Texas Instruments-Production Data