LM3S811 Datasheet, PDF (232/595 Pages) List of Unclassifed Manufacturers – Microcontroller

General-Purpose Input/Outputs (GPIOs)
7.1 Block Diagram
Figure 7-1. GPIO Module Block Diagram
PA0
U0Rx
UART0
PA1
U0Tx
PA2
SSIClk
PA3
SSIFss
SSI
PA4
SSIRx
PA5
SSITx
PB0
PWM2
PWM1
PB1
PWM3
PB2
I2CSCL
I²C
PB3
I2CSDA
PB4
C0-
PB5
Analog
Comparator
C0o
PB6
C0+
PB7
JTAG
PWM4
PE0
PWM2
PWM5
PE1
Fault
PWM0 ^PWM0
PD0
PWM1
PD1
UART1
U1Rx
PD2
U1Tx
PD3
CCP1 Timer0 CCP0
PD4
CCP3 Timer1 CCP2
PD5
PD6
PD7
GPIO Port C
7.2 Signal Description
GPIO signals have alternate hardware functions. Table 7-4 on page 235 and Table 7-5 on page 235
list the GPIO pins and their analog and digital alternate functions. The AINx analog signals are not
5-V tolerant and go through an isolation circuit before reaching their circuitry. These signals are
configured by clearing the corresponding DEN bit in the GPIO Digital Enable (GPIODEN) register
and setting the corresponding AMSEL bit in the GPIO Analog Mode Select (GPIOAMSEL) register.
Other analog signals are 5-V tolerant and are connected directly to their circuitry (C0-, C0+). These
signals are configured by clearing the DEN bit in the GPIO Digital Enable (GPIODEN) register. The
digital alternate hardware functions are enabled by setting the appropriate bit in the GPIO Alternate
232
July 24, 2012
Texas Instruments-Production Data