參數(shù)資料
型號(hào): S1D13706F00A
元件分類: 顯示控制器
英文描述: 320 X 240 PIXELS CRT OR FLAT PNL GRPH DSPL CTLR, PQFP100
封裝: TQFP-100
文件頁數(shù): 135/171頁
文件大小: 4940K
代理商: S1D13706F00A
7751 Group User’s Manual
20–69
APPENDIX
Appendix 8. Examples of noise immunity improvement
5. Setup for I/O ports
Setup I/O ports by hardware and software as follows:
<Hardware protection>
q Connect a resistor of 100 ohms or more to an I/O port in series.
<Software protection>
q As for an input port, read data several times for checking whether input levels are equal or not.
q As for an output port, since the output data may reverse because of noise, rewrite data to its port Pi
register periodically.
q Rewrite data to port Pi direction registers periodically.
Fig. 15. Setup for I/O ports
Noise
Direction register
Port latch
Data bus
Port
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