Table 3-15. TI 60-Pin Connector (J33) Pin-Out (continued)
Pin No.
Signal
Pin No.
Signal
9
NC
39
MIPI_TRC_DAT10
10
NC
40
JTAG_MIPI_EMU1
11
NC
41
MIPI_TRC_DAT11
12
VCC_3V3_MIPI
42
NC
13
MIPI_TRC_CLK
43
MIPI_TRC_DAT12
14
NC
44
NC
15
DGND
45
MIPI_TRC_DAT13
16
DGND
46
NC
17
MIPI_TRC_CTL
47
MIPI_TRC_DAT14
18
MIPI_TRC_DAT19
48
NC
19
MIPI_TRC_DAT00
49
MIPI_TRC_DAT15
20
MIPI_TRC_DAT20
50
NC
21
MIPI_TRC_DAT01
51
MIPI_TRC_DAT16
22
MIPI_TRC_DAT21
52
NC
23
MIPI_TRC_DAT02
53
MIPI_TRC_DAT17
24
MIPI_TRC_DAT22
54
NC
25
MIPI_TRC_DAT03
55
MIPI_TRC_DAT18
26
MIPI_TRC_DAT23
56
NC
27
MIPI_TRC_DAT04
57
DGND
28
NC
58
SEL_XDS100_INV
29
MIPI_TRC_DAT05
59
NC
30
NC
60
NC
3.4.6 Test Automation
A Test automation header J38 is provided to allow an external controller to control the power on/off, boot modes,
reset functionality and current measurement to support automated testing. The test automation header includes
four GPIOs, two I2C interfaces. The basic controls as follows.
Table 3-16. List of Signals Routed to Test Automation Header
Signal
Signal Type
Function
POWER_DOWN
GPIO
Instructs the EVM to power down all circuits
POR
GPIO
Creates a PORz into the AM64x SoC
WARM_RESET
GPIO
Creates a RESETz into the AM64x SoC
GPIO1
GPIO
GPIO for communication with AM64x SoC
GPIO2
GPIO
Connected to I2C IO Expander
GPIO3
GPIO
Used to Enable the BOOTMODE Buffer
GPIO4
GPIO
Used to Reset the Boot mode IO Expander
I2C0
I2C
Commnicates with Boot mode I2C buffer
I2C2
I2C
Communicates with INA226 current
measurement devices
One of the I2C interface from Test automation header is connected to an I2C IO expander, which can drive the
Boot mode pins of the processor.
Note
The bootmode selection switches should be in the OFF condition and GPIO3 should be set to logic
low to enable this mode.
System Description
SPRUIX0B – FEBRUARY 2021 – REVISED MARCH 2021
AM64x GP EVM User's Guide
23
Copyright © 2021 Texas Instruments Incorporated