Digi NS9215 - Manual (Page 5)

5
Contents
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C h a p t e r 1 : P i n o u t ( 2 6 5 ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
The Legend .............................................................................. 27
Memory bus interface......................................................................... 28
Ethernet interface MAC....................................................................... 30
General purpose I/O (GPIO) ................................................................. 31
System clock ................................................................................... 43
System clock drawing .................................................................. 44
RTC clock and battery backup drawing ............................................. 45
System mode ................................................................................... 45
System reset ................................................................................... 47
JTAG Test....................................................................................... 48
ADC .............................................................................................. 49
POR and battery-backed logic ............................................................... 50
Power and ground ............................................................................. 51
C h a p t e r 2 : I / O C o n t r o l M o d u l e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
System memory bus I/O control...................................................... 53
Control and Status registers ................................................................. 53
Register address map .................................................................. 53
GPIO Configuration registers ................................................................ 55
GPIO configuration options............................................................ 55
GPIO Configuration Register #0 ...................................................... 56
GPIO Configuration Register #1 ...................................................... 56
GPIO Configuration Register #2 ...................................................... 57
GPIO Configuration Register #3 ...................................................... 57
GPIO Configuration Register #4 ...................................................... 58
GPIO Configuration Register #5 ...................................................... 58
GPIO Configuration Register #6 ...................................................... 59
GPIO Configuration Register #7 ...................................................... 59
GPIO Configuration Register #8 ...................................................... 60
GPIO Configuration Register #9 ...................................................... 60
GPIO Configuration Register #10 ..................................................... 61
GPIO Configuration Register #11 ..................................................... 61
GPIO Configuration Register #12 ..................................................... 62
GPIO Configuration Register #13 ..................................................... 62
GPIO Configuration Register #14 ..................................................... 63