Table 4-16. Test Automation Header Pinout - Texas Instruments LaunchPad AM243 Series User Manual

Hardware Description
A boot mode buffer (SN74AVC8T245RHL) is used to isolate the boot mode controls that are driven through
either the DIP switch or the I2C IO expander. The test automation circuit is powered by an always on supply that
is generated from a dedicated regulator (TPS7A0533PDBVT).
The test automation header supports two I2C interfaces. Bootmode_I2C connects to the boot mode buffer to
control the bootmode of the AM243x while the other I2C interface is connected to the I2C1 port of the AM243x.
Pin # IO Direction
1 Power
2 Power
3 Power
4 N/A
5 N/A
6 N/A
7 Ground
8 N/A
9 N/A
10 N/A
11 N/A
12 N/A
13 N/A
14 N/A
15 N/A
16 Ground
17 N/A
18 N/A
19 N/A
20 N/A
21 N/A
22 N/A
23 N/A
24 N/A
25 Ground
26 Output
27 Output
28 Output
29 N/A
30 Output
31 Bidirectional
32 Output
33 Outpu
34 Ground
35 N/A
36 Bidirectional
37 Bidirectional
38 Bidirectional
39 Bidirectional
40 Ground
41 Ground
78 AM243x LaunchPad™ Development Kit User's Guide

Table 4-16. Test Automation Header Pinout

Signal
VCC3V3_TA
VCC3V3_TA
VCC3V3_TA
Reserved
Reserved
Reserved
DGND
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
DGND
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
DGND
TEST_POWERDOWN
TEST_PORZn
TEST_WARMRESETn
Reserved
TA_SOC_INTn
TEST_GPIO2
TEST_GPIO3
TEST_GPIO4
DGND
Reserved
SOC_I2C1_TA_SCL
BOOTMODE_I2C_SCL
SOC_I2C1_TA_SDA
BOOTMODE_I2C_SDA
DGND
DGND
Copyright © 2022 Texas Instruments Incorporated
Description
Power for test automation header
Used to power down the board
Used to reset the SoC PORz
Used to reset the SoC Warm Reset
Interrupt to SoC
Used to disable the BOOTMODE buffer
Used to Reset the BOOTMODE IO Expander
Clock signal for SoC I2C
Clock signal for I2C IO expander for boot mode
Data signal for SoC I2C
Data signal for I2C IO expander for boot mode
SPRUJ12B – AUGUST 2021 – REVISED OCTOBER 2022
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