Safety Connector; Spi Interfaces; I2C Interfaces; Table 3-27. Safety Connector Pinouts - Texas Instruments AM64 Series User Manual

System Description

3.4.17 Safety Connector

A 12x2 standard 0.1" spaced header- TSW-112-07-S-D is included as a safety signal connector. The safety
connector includes signals connected to the MCU. The 24 pins include MCU_I2C0, MCI_I2C1, MCU_UART1,
MCU_SPI0 and MCU_SPI1 signals. This provides eighteen signals that can be used as either the specified
interface or as MCU_GPIOs. In addition the CONN_MCU_RESETz, CONN_MCU_PORz, MCU_RESETSTATz
and MCU_SAFETY_ERRORn signals are supported with the connector.
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12

3.4.18 SPI Interfaces

• SPI0: A 1Kbit SPI EEPROM (93LC46B) is interfaced to SPI0 port of the AM64x/AM243x. It is used for testing
purposes.
• SPI1: This interface is routed to the HSE Connector. The SPI1 interface signals are at a 3.3 V IO level.
– SPI1_CS0 is routed to the HSE expansion header (J2)
– SPI1_CS1 is routed to the HSE expansion header (J2)

3.4.19 I2C Interfaces

There are five I2C interfaces used in the GP EVM board.
1. MAIN_I2C0: This interface is used by the software to identify the EVM and to control the power supply
circuit. It is interfaced to presence detect latch to identify the daughter cards which are presently installed,
Board ID memory device, board ID memories of the daughter cards and HSE connector. This I2C is also
connected to a test header J5 for AM64x/AM243x processor slave operation. Pin outs of I2C test header is
given in Table 3-28.
Pin No.
56 AM64x/AM243x GP EVM User's Guide

Table 3-27. Safety Connector Pinouts

Signal
VCC_3V3_SYS
MCU_SPI0_D1
MCU_SPI0_CS1
MCU_SPI0_D0
MCU_GPIO0_8
MCU_SPI0_CS0
TEST_LED2
MCU_GPIO0_6
MCU_GPIO0_7
MCU_UART1_CTS_3V3
MCU_UART1_RX_3V3
MCU_GPIO0_9

Table 3-28. I2C Test Header (J5) Pin-out

1
2
3
Copyright © 2021 Texas Instruments Incorporated
Pin No.
13 MCU_UART1_RTS_3V3
14 MCU_I2C1_SDA
15 MCU_UART1_TX_3V3
16 MCU_SPI0_CLK
17 MCU_I2C0_SDA
18 MCU_I2C1_SCL
19 MCU_RESETSTATZ
20 MCU_I2C0_SCL
21 CONN_MCU_RESETZ
22 MCU_SAFETY_ERRORZ_3V3
23
24 CONN_MCU_PORZ
Signal
DGND
SoC_I2C0_SDA
SoC_I2C0_SCL
SPRUIX0C – FEBRUARY 2021 – REVISED JUNE 2021
www.ti.com
Signal
DGND
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