I am using an Atmel AT89S8253 MCU with the W5100 controller via SPI.
Although software (bit-banging) SPI does work, I cannot use the integrated hardware SPI of the 89S8253.
I’ve tried all modes, but even mode 0 does not work, reducing the ISP-Speed didn’t work either.
On the other hand, I can drive SD-Cards and a 128x160 TFT-Display at full speed (12Mhz SPI-clock) without any problems in the same circuit.
Has anyone else got similar problems?