CAPA500 Intel
®
Core
TM
Processor Family 3.5
” Board
Digital I/O
71
Appendix B
Digital I/O
B.1 About Digital I/O
The digital I/O on CPU board has 8 bits. Each bit can be set to function as input or output by
software programming. In default, all pins are pulled high with +5V level (according to main
power). The BIOS default settings are 3 inputs and 5 outputs where all of these pins are set to
1.
CN9
B.2 Digital I/O Programming
I
2
C to GPIO PCA9554PW GPIO.
I
2
C address: 01000100.
Command byte
Command
Protocol
Function
0
Read byte
Input port register
1
Read/write byte
Output port register
2
Read/write byte
Polarity inversion register
3
Read/write byte
Configuration register
The command byte is the first byte to follow the address byte during a write transmission. It is
used as a pointer to determine which of the following registers will be written or read.
Pin Signal
Pin
Signal
1
DI0
2
DO4
3
DI1
4
DO3
5
DI2
6
DO2
7
DO0
8
DO1
9
+5V
10
GND
1
Содержание CAPA500
Страница 1: ...CAPA500 6th 7th Generation Intel CoreTM Processor Family 3 5 Board User s Manual ...
Страница 6: ...vi This page is intentionally left blank ...
Страница 10: ...CAPA500 Intel Core TM Processor Family 3 5 Board 4 Introduction This page is intentionally left blank ...
Страница 12: ...CAPA500 Intel Core TM Processor Family 3 5 Board 6 Board and Pin Assignments Bottom View Side View ...
Страница 14: ...CAPA500 Intel Core TM Processor Family 3 5 Board 8 Board and Pin Assignments Bottom View ...
Страница 30: ...CAPA500 Intel Core TM Processor Family 3 5 Board 24 Hardware Description 3 4 I O Port Address Map ...
Страница 32: ...CAPA500 Intel Core TM Processor Family 3 5 Board 26 Hardware Description ...
Страница 33: ...CAPA500 Intel Core TM Processor Family 3 5 Board Hardware Description 27 ...
Страница 34: ...CAPA500 Intel Core TM Processor Family 3 5 Board 28 Hardware Description ...
Страница 35: ...CAPA500 Intel Core TM Processor Family 3 5 Board Hardware Description 29 ...
Страница 36: ...CAPA500 Intel Core TM Processor Family 3 5 Board 30 Hardware Description ...
Страница 37: ...CAPA500 Intel Core TM Processor Family 3 5 Board Hardware Description 31 ...
Страница 38: ...CAPA500 Intel Core TM Processor Family 3 5 Board 32 Hardware Description ...
Страница 40: ...CAPA500 Intel Core TM Processor Family 3 5 Board 34 Hardware Description This page is intentionally left blank ...
Страница 56: ...CAPA500 Intel Core TM Processor Family 3 5 Board 50 AMI BIOS Setup Utility DIO port 1 8 ...
Страница 76: ...CAPA500 Intel Core TM Processor Family 3 5 Board 70 Watchdog Timer This page is intentionally left blank ...
Страница 80: ...CAPA500 Intel Core TM Processor Family 3 5 Board 74 Digital I O This page is intentionally left blank ...
Страница 88: ...CAPA500 Intel Core TM Processor Family 3 5 Board 82 iAMT Settings This page is intentionally left blank ...