4.3 GPIO Mapping
describes the detailed GPIO mapping of the SoC with the LaunchPad peripherals.
Table 4-10. GPIO Mapping Table
Net Name
Package Signal Name
GPIO Number
Input or Output
Default
State
Function
TEST_LED1_GREEN
GPMC0_AD7
GPIO0_22
Output
PD
Active High
To turn on the green test
LED
TEST_LED2_RED
UART0_RTSN
GPIO1_55
Output
PD
Active High
To turn on the red test
LED
TEST_LED3_RED
PRG1_PRU1_GPO18
GPIO1_39
Output
PD
Active High
To turn the bicolor LED
red
TEST_LED4_GREEN
PRG1_PRU1_GPO19
GPIO1_38
Output
PD
Active High
To turn the bicolor LED
green
USER_LED1
GPMC0_AD11
GPIO0_26
Output
PD
Active High
To turn on the green user
LED1
USER_LED2
GPMC0_AD15
GPIO0_30
Output
PD
Active High
to turn on the green user
LED2
USER_INTn
UART_CTSN
GPIO1_54
Input
PU
Active Low
User interrupt input from
push button switch
OSPI0_RESET_N
OSPI0_CSN1
GPIO0_12
Ouput
PU
Active Low
To reset the QSPI FLASH
on OSPI0 interface
MCAN/eQEP_MUX_SEL PRG0_PRU1_GPO8
GPIO1_28
Output
PD
N/A
To select the functionality
of MCAN0_RX pin as
MCAN0_RX or eQEP_I
FSI/BP_MUX_SEL
GPMC0_AD13
GPIO0_28
Output
PD
N/A
To select the functionality
of GPMC0_AD8 and
GPMC0_AD9 pins as
FSI_RX or PWM
MCAN0_STB
PRG0_PRU1_GPO5
GPIO1_25
Output
PU
Active Low
To put the CAN
transceiver out of standby
PRG_CPSW_RGMII1_
MUX_SEL
PRG1_PRU1_GPO5
GPIO0_70
Output
PD
N/A
To select the RGMII1 path
between PRG and CPSW
GPIO_RGMII1_PHY_RS
Tn
PRG1_PRU1_GPO8
GPIO0_73
Output
PU
Active Low
To reset the RGMII1
Ethernet PHY
GPIO_RGMII2_PHY_RS
Tn
PRG1_PRU1_GPO18
GPIO0_20
Output
PU
Active Low
To reset the RGMII2
Ethernet PHY
PRG1_CPSW_RGMII_IN
Tn
PRG1_PRU1_GP19
GPIO0_84
Input
PU
Active Low
Interrupt signal from
both RGMII1 & RGMII2
Ethernet PHY's
GPIO0_50
PRG1_PRU0_GPO5
GPIO0_50
IO
NA
NA
GPIO connected to
BoosterPack header
Hardware Description
58
AM243x LaunchPad™ Development Kit User's Guide
SPRUJ12B – AUGUST 2021 – REVISED OCTOBER 2022
Copyright © 2022 Texas Instruments Incorporated
