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ADS1298RECGFE-PDK: Can't read ID from ADS1298RECGFE-PDK without MMB0

Part Number: ADS1298RECGFE-PDK
Other Parts Discussed in Thread: ADS1298


I'm trying to use the ADS1298RECGFE-PDK board without MMB0. I set the jumpers and I connected pins as describe below, but every time I try to read anything from SPI I receive 0xC0. I don't have any idea what could be wrong.


JP15: 2-3        JP1: connect        JP5: not connect        JP2: 2-3        JP20: 1-2        JP4: connect        JP24: 2-3        JP18: 2-3        JP19: 1-2        JP21: 1-2        JP22: 2-3         JP23:1-2        JP36: 1-2

Power Connections:

J4.5: GND        J4.9: +3V3        J4.10: +5V

SPI Connections:

J3.1: CS        J3.3: SCLK        J3.4: GND        J3.11: MOSI        J3.13: MISO        J3.14:+3V3


8 bits word        1MHz        POL:0        PHA:1        First bit: MSbit        First word:LSWord

Print screens from oscilloscope, my osc has only two channels, so I took 2 pictures, one showing MOSI another showing MISO

Blue: SCLK        Yellow: MOSI        Sent: 0x20 0x00        Received: 0xC0 0x00

Blue: SCLK        Yellow: MISO        Sent: 0x20 0x00        Reecived: 0xC0 0x00