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PGA450 programming via SPI

user4181621
Prodigy 40 points
Other Parts Discussed in Thread: PGA450-Q1

If anyone want to communicate with PGA450 via SPI. Please note:

1. SPI commands :  1.1. CS pin = 0;  1.2. send command, address, data.  1.3. CS pin = 1.

2. Program DevRAM sequence.   https://e2e.ti.com/support/applications/automotive/f/26/t/453176

Please note : when you want to write 0x55 in DEVRAM at address 0x2000, the command is "1F000055" not "1F200055"

 

 

  • 0
    TI__Mastermind 27780 points
    Hello User,

    SPI is typically reserved for debug and development purposes. This is due to the limitation that the PGA450-Q1's internal 8051 microcontroller must be placed in the reset state in order to send/receive SPI commands. Would you be able to use UART or LIN instead? We have example code available for these two interfaces.