SPRUIM6A October 2018 – November 2020
A test automation header J41 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 and two I2C interfaces. The basic controls are listed in Table 3-18.
Signal | Signal Type | Function |
---|---|---|
POWER_DOWN | GPIO | Instructs the EVM to power down all circuits |
POR | GPIO | Creates a PORz into the Maxwell |
WARM_RESET | GPIO | Creates a RESETz into the Maxwell |
GPIO1 | GPIO | GPIO for communications with Maxwell |
GPIO2 | GPIO | GPIO for communications with Maxwell |
GPIO3 | GPIO | Used to Enable the BOOTMODE Buffer |
GPIO4 | GPIO | Used to Reset the Boot mode IO Expander |
I2C | I2C | Communicates with boot mode I2C buffer |
I2C2 | I2C | Communicates with INA226 current measurement devices |
One of the I2C interfaces from the test automation header is connected to an I2C I/O expander, which can drive the boot mode pins of the processor. The bootmode selection switches should be in the OFF condition. GPIO3 should be set to logic low to enable this mode.
The other I2C interface is connected to the current measurement and temperature sensing devices present on the I2C2 port of the SoC.
The test automation connector is used by Texas Instruments to control the software regression testing and comparative power measurements. The connector is provided to allow customers to develop their own testing and power measurements of customer applications. Power measurements are not a substitute for the AM65x Power Estimation Tool and should not be used for the design of power supply solutions. Power measurements vary based on silicon process and environment, and measurements should only be used for comparison with other measurements taken on the same EVM.
Pin no. | Signal | I/O Direction (to CP Board) |
---|---|---|
1 | VCC3V3_1 | Power (out) |
2 | VCC3V3_1 | Power (out) |
3 | VCC3V3_1 | Power (out) |
4 | NC | NA |
5 | NC | NA |
6 | NC | NA |
7 | DGND | Ground |
8 | NC | NA |
9 | NC | NA |
10 | NC | NA |
11 | NC | NA |
12 | NC | NA |
13 | NC | NA |
14 | NC | NA |
15 | NC | NA |
16 | DGND | Ground |
17 | NC | NA |
18 | NC | NA |
19 | NC | NA |
20 | NC | NA |
21 | NC | NA |
22 | NC | NA |
23 | NC | NA |
24 | NC | NA |
25 | DGND | Ground |
26 | TEST_POWERDOWN | Input |
27 | TEST_PORZn | Input |
28 | TEST_WARMRESETn | |
Input | ||
29 | NC | NA |
30 | TEST_GPIO1 | Bidirectional |
31 | TEST_GPIO2 | Bidirectional |
32 | TEST_GPIO3 | Input |
33 | TEST_GPIO4 | Input |
34 | DGND | Ground |
35 | NC | NA |
36 | SOC_I2C2_SCL | Bidirectional |
37 | BOOTMODE_I2C_SCL | Bidirectional |
38 | SOC_I2C2_SDA | Bidirectional |
39 | BOOTMODE_I2C_SDA | Bidirectional |
40 | DGND | Ground |
41 | DGND | Ground |
42 | DGND | Ground |