Other Parts Discussed in Thread: PGA450Q1EVM
Support Path: /Product/Development and troubleshooting/
I'm having an issue with the PGA450 involving SPI communication.
My test setup:
SPI master: STM32F2
SPI phase: 2 edge
SPI polarity: 0
SPI wordsize: 8bit
The PGA450 eval board is connected the STM3 through a level shifter, to go from 3V3 TTL to 5V logic for the PGA450.
I'm trying to program registers within the ESFR. The first thing I do after PGA450 powerup is send a 0x16 0x2F 0x01 to put the onboard mcu into reset to allow for ESFR access. After another transfer, I get the following response to this command: 0x02 0x00 0x00. this would indicate that the command was successful.
Next, I try to read the current value of ESFR address 0xc0, as per the datasheet example. I send: 0x19 0xc0 0x00. Again, after another transfer, the response to this command is 0xc2 0x00 0x00. This would indicate a parity error.
What's going on here? As per datasheet example (Table 17) this is a valid command. Any ideas?
Chris
