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Analog Input ..................................................................................................................... 51
External Connections........................................................................................... 51
Calibration ........................................................................................................... 51
Binary Format (0 to +4.095V Only) .................................................................... 52
ADC State Machine ............................................................................................. 52
Analog Input Using the SPI Interface.................................................................. 54
Analog Input "Bit Bang" Register ....................................................................... 55
Digital I/O ......................................................................................................................... 56
External Connections........................................................................................... 56
Digital I/O Port Configuration Using the SPI Interface....................................... 56
Digital I/O "Bit Bang" Register........................................................................... 59
SPI Interface ..................................................................................................................... 61
External Connections........................................................................................... 61
SPI Legacy Mode ................................................................................................ 62
SPI "Bit Bang" Mode .......................................................................................... 65
PWM Outputs and TACH Inputs...................................................................................... 66
External Connections........................................................................................... 66
PWM Output and Tach Input Code Example ...................................................... 66
PC/104 Expansion Bus ..................................................................................................... 69
PC/104 I/O Support ............................................................................................. 69
PC/104 Memory Support ..................................................................................... 69
IRQ Support......................................................................................................... 69
DMA Support ...................................................................................................... 69
System Resources and Maps....................................................................................... 70
Memory Map .................................................................................................................... 70
I/O Map............................................................................................................................. 70
Interrupt Configuration ..................................................................................................... 71
Special Registers .......................................................................................................... 72
Product ID and PLED Register......................................................................................... 72
Revision and Type Register .............................................................................................. 73
Jumper Status Register...................................................................................................... 74
General Purpose Output Register...................................................................................... 74
IRQ and Resource ISA Routing Register ......................................................................... 75
Mode Control Register...................................................................................................... 76
Appendix A - References ............................................................................................. 77
EBX-22 Reference Manual
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