2. MAIN_I2C1: This is interfaced to 16 bit GPIO expanders that is being used for all control signals and LED
controls, 8bit LED Driver with part number TPIC2810, Current Monitors with part number INA226 to monitor
current of VDD_CORE, VDDAR_CORE, SoC_DVDD3V3, SoC_DVDD1V8, VDDA_1V8, VDD_DDR4 ,
Temperature sensor with part number TMP100, Display Interface with part number OSD9616P0992-10,
Test automation connector via voltage isolation. This I2C is also connected to a test header J4 for AM64x
processor slave operation. Pin outs of I2C test header is given in Table 3-29.
Table 3-29. I2C Test Header (J4) Pin-out
Pin No. Signal
1 SoC_I2C1_SCL
2 SoC_I2C0_SDA
3 DGND
4 INA_ALERT
5 NC
3. MAIN_I2C3: This is connected to the expansion board connector from a mux. I2C3 is muxed with the MCAN
signals. The default state of the mux is MCAN.
4. MCU_I2C0: This is connected to the safety connector.
5. MCU_I2C1: This is connected to the safety connector.
Figure 3-30 depicts the I2C tree.
Figure 3-30. AM64x/AM243x I2C Interfaces and Address Assignment of Peripherals
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System Description
SPRUIX0C – FEBRUARY 2021 – REVISED JUNE 2021
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AM64x/AM243x GP EVM User's Guide 57
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