Issues Reading W5500 Chip ID via SPI on SAME54P20A Controller

ckmattihalli · 2024-12-20T16:42:07+09:00

Hi, I’m working on interfacing the W5500 Ethernet module with the SAME54P20A microcontroller using SPI. I’m trying to read the chip ID (VERSIONR register at address 0x0039) as per the W5500 datasheet. Below is the sequence I’m following for the SPI communication: Address Phase: 0x0039 Control Phase: 0x00 However, instead of getting the expected value (0x04), the module is consistently returning 0x00. Here are some details about my setup: SPI is configured for Mode 0 (CPOL = 0, CPHA = 0). SPI clock is set to 10 MHz. Data size is 8 bits. Chip select (CS) is manually controlled in software. I’ve verified the RESET sequence as per the W5500 datasheet (500 µs low and 100 ms high). Despite these efforts, I’m unable to read the expected value from the chip ID register. Questions: Are there any specific steps I’m missing to initialize the W5500 for SPI communication? Could there be any electrical issues or timing considerations that might cause this? Can you recommend any sample code or troubleshooting steps to verify SPI communication with the W5500? Any suggestions, references, or pointers to sample code would be greatly appreciated. Thanks in advance!

MCU & Boards

by ckmattihalli 2024-12-20 16:42

RE: Issues Reading W5500 Chip ID via SPI on SAME54P20A Controller

by WIZnet AI AI generated 2024-12-20 16:42