Hello,
I have two boards which behave weirdly on both slots:
E.g. for slot A the photodiode input connections is set to 5, such that PD1 is connected to channel 1, PD2 to channel 2, PD3 to channel 3 and PD4 to channel 4. However, when I only connect a photodiode to PD2 and leave the other photodiode inputs floating, both channel 2 and 4 react with similar strength to light pulses. This happens in normal mode, in normal mode with integrator chopping as well as in the TIA ADC mode with background light. When I only connect a photodiode to PD4 and leave the other photodiode inputs floating, channel 4 reacts and channel 2 doesn't. So it only happens in one direction. Additionally, channel 4 doesn't react as strongly to light as the other channels (except when PD2 is connected to a photodiode).
And for strong light inputs all channels react, even if only one photodiode input is connected to a photodiode, regardless of which channel is connected.
I have triple checked my register definitions, bit position definitions and mask definitions and can't find the error. I have two boards assembled which both behave this way.
Does anybody know what might be the cause of this behavior? Or can somebody spot something wrong with my register settings?
Help would be very much appreciated. If you need more info let me know.
These are all the register readouts of the ADPD after initilization:
0x0: 0x0
0x1: 0xff
0x2: 0x4
0x4: 0x0
0x6: 0x0
0x8: 0xa16
0x9: 0xc8
0xa: 0x0
0xb: 0xd
0xd: 0x0
0xf: 0x0
0x10: 0x1
0x11: 0x1021
0x12: 0x320
0x14: 0x456
0x15: 0x0
0x16: 0x3000
0x17: 0xa
0x18: 0x0
0x19: 0x0
0x1a: 0x0
0x1b: 0x0
0x1c: 0x3000
0x1d: 0xa
0x1e: 0x0
0x1f: 0x0
0x20: 0x0
0x21: 0x0
0x22: 0x3000
0x23: 0x3000
0x24: 0x3000
0x25: 0x630c
0x30: 0x219
0x31: 0x83f
0x34: 0x0
0x35: 0x217
0x36: 0x13f
0x37: 0x0
0x38: 0x4000
0x39: 0x1a08
0x3b: 0x1be0
0x3c: 0x3006
0x3e: 0x320
0x3f: 0x320
0x42: 0x1c78
0x43: 0xada5
0x44: 0x1c38
0x45: 0xada5
0x4b: 0x2698
0x4d: 0x9e
0x4f: 0x20b8
0x50: 0x0
0x54: 0xaa0
0x55: 0x0
0x58: 0x122
0x59: 0x808
0x5a: 0x10
0x5e: 0x808
0x5f: 0x0
0x60: 0xffff
0x64: 0x0
0x65: 0x0
0x66: 0x0
0x67: 0x0
0x68: 0x0
0x69: 0x0
0x6a: 0x0
0x6b: 0x0
0x70: 0x0
0x71: 0x0
0x72: 0x0
0x73: 0x0
0x74: 0x0
0x75: 0x0
0x76: 0x0
0x77: 0x0
0x78: 0x0
0x79: 0x0
0x7a: 0x0
0x7b: 0x0
0x7c: 0x0
0x7d: 0x0
0x7e: 0x0
0x7f: 0x0
Best regards
