Pinouts » History » Revision 4
Revision 3 (foft, 04/15/2018 07:25 PM) → Revision 4/12 (foft, 04/15/2018 07:25 PM)
h1. Pinouts h2. V1 h2. V2 h3. Use in core h3. By connection to FPGA GPIO: 1-17: direct to FPGA 18: SDA (i2c) - clock gen also on here 19: SCL (i2c) - clock gen also on here 20-22: GND 23-34: 3.3V 25-26: 5.0V Interface 1: All level shifted to 3.3V. Special pins: 37:RD4: 10k pulldown 40:RD5: 10k pulldown 34:MPD_N: 4.7k pullup to 5V 28:IRQ_N: 4.7k pullup to 5V 32:REF_N: 2k pullup to 5V Interface 2: 1-3: USB to FTDI 4: GND 5,6: 5V 7-10: Charge cap, FPGA compares with ref voltage 11-30: level shifted to 3.3V. 4.7k pullup to 5V. Direction pins have extra 220 ohm resistance (needed?) 31: GND 32-33: level shifted to 3.3V. 4.7k pullup to 5V 34: 5V transistor drive (for tape motor) 35-49: level shifted to 3.3V. 4.7k pullup o 5V 40: EXTSEL_N: level shifted to 3.3V. 4.7k pullup to 5V