SPRADT3 June   2026 AWR2188

 

  1.   1
  2.   Abstract
  3. 1Introduction to AWR2188
  4. 2Hardware Architecture and Design
    1. 2.1 Radar System Architecture
    2. 2.2 AWR2188 Radar Hardware Design
    3. 2.3 SOP Pin Configuration
    4. 2.4 AWR2188 Reset and RBL Boot Process
  5. 3AWR2188 External Processor Software Configuration
    1. 3.1 External Processor Powers on and Configures MSS
    2. 3.2 DFP Image Download
    3. 3.3 MSS Application Boot and Configuration
  6. 4AWR2188 SPI/I2C Configuration and Signal Analysis
    1. 4.1 SPI Boot Configuration and Timing
    2. 4.2 I2C Boot Configuration and Timing
  7. 5References
  8. 6Modification History

4.2 I2C Boot Configuration and Timing

When AWR2188 SOP[2:0] is configured as 111, AWR2188 will communicate with the external processor through the I2C protocol. The pins used on AWR2188 are shown in Table 4-4. In the I2C protocol, SPI_BUSY and HOST_IRQ are also both necessary, used to synchronize I2C signals and trigger asynchronous events.

Table 4-4 I2C Hardware Pins
SIGNAL_NAME Description APE PIN
MSS_GPIO_0 Used by SPI_BUSY, I2C/SPI control signal AF13
MSS_HOSTIRQ Used by HOST_IRQ, used to trigger asynchronous events AF17
MSS_I2CA_SCL I2C clock signal AF22
MSS_I2CA_SDA I2C data signal AF23
MSS_GPIO_2 Used by I2C_ADDR_0 in SOP_I2C AF6
MSS_GPIO_4 Used by I2C_ADDR_1 in SOP_I2C AF20
MSS_GPIO_5 Used by I2C_ADDR_2 in SOP_I2C AG22

The I2C address of AWR2188 is configured according to the following format. The last three bits of the I2C address can be customized by the user according to needs, ranging from 0101000 to 0101111.

AWR2188 I2C ADDRESS
0 1 0 1 MSS_GPIO_5 MSS_GPIO_4 MSS_GPIO_2

The entire I2C protocol is consistent with the SPI protocol. SPI and I2C use exactly the same underlying drivers, so the I2C protocol of AWR2188 can be analyzed with reference to the SPI protocol. However, since AWR2188 has only one data line (I2C_SDA), the verification signal will be turned off in I2C mode, and the external processor will not receive the verification signal returned by AWR2188.