User`s manual

Table Of Contents
111 Appendix C
C.22 GPIO Pin Header (SMD pitch=2.0mm) (CN93)
C.23 System I/O Ports
Table C.22: GPIO pin header (CN93)
Pin Signal Pin Signal
1
GPIO_PORT80_1
8
GND
2
GPIO_PORT80_5
9
GPIO_PORT80_3
3
VCC_GPIO
10
GPIO_PORT80_7
4
GND
11
GND
5
GPIO_PORT80_2
12
GND
6
GPIO_PORT80_6
13
GPIO_PORT80_4
7
GND
14
GPIO_PORT80_8
Table C.23: System I/O ports
Addr. range (Hex) Device
000-01F DMA controller
020-021 Interrupt controller 1, master
022-023 Chipset address
040-05F 8254 timer
060-06F 8042 (keyboard controller)
070-07F Real-time clock, non-maskable interrupt (NMI)
mask
080-09F DMA page register
0A0-0BF Interrupt controller 2
0C0-0DF DMA controller
0F0 Clear math co-processor
0F1 Reset math co-processor
0F8-0FF Math co-processor
1F0-1F8 Fixed disk