LM3S2776 Datasheet, PDF (349/785 Pages) Texas Instruments – Stellaris® LM3S2776 Microcontroller

Stellaris® LM3S2776 Microcontroller
(GPIOPCTL) register to the numeric enoding shown in the table below. Note that each pin must be
programmed individually; no type of grouping is implied by the columns in the table.
Important: All GPIO pins are configured as GPIOs and tri-stated by default (GPIOAFSEL=0,
GPIODEN=0, GPIOPDR=0, GPIOPUR=0, and GPIOPCTL=0, with the exception of the
four JTAG/SWD pins (shown in the table below). A Power-On-Reset (POR) or asserting
RST puts the pins back to their default state.
Table 9-1. GPIO Pins With Non-Zero Reset Values
GPIO Pins
PA[1:0]
PA[5:2]
PB[3:2]
PC[3:0]
Default State
UART0
SSI0
I²C0
JTAG/SWD
GPIOAFSEL GPIODEN GPIOPDR GPIOPUR
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
GPIOPCTL
0x1
0x1
0x1
0x3
Table 9-2. GPIO Pins and Alternate Functions (64LQFP)
IO
Pin Number
Multiplexed Function
PA0
17
U0Rx
PA1
18
U0Tx
PA2
19
SSI0Clk
PA3
20
SSI0Fss
PA4
21
SSI0Rx
PA5
22
SSI0Tx
PA6
25
PWM4
PA7
26
PWM5
PB0
41
PWM2
PB1
42
PWM3
PB2
47
I2C0SCL
PB3
27
I2C0SDA
PB4
58
CAN0Rx
PB5
57
CAN0Tx
PB6
56
Fault1
PB7
55
NMI
PC0
52
TCK
PC1
51
TMS
PC2
50
TDI
PC3
49
TDO
PC4
11
PWM6
PC5
14
Fault2
PC6
15
PWM7
PC7
16
CCP0
PD0
61
PWM0
PD1
62
PWM1
PD2
63
ADC5
Multiplexed Function
SWCLK
SWDIO
SWO
November 17, 2011
349
Texas Instruments-Production Data