參數(shù)資料
型號(hào): M34551E8-XXXFP
元件分類: 微控制器/微處理器
英文描述: 4-BIT, OTPROM, MICROCONTROLLER, PQFP48
封裝: 7 X 10 MM, 0.65 MM PITCH, PLASTIC, QFP-48
文件頁數(shù): 138/154頁
文件大?。?/td> 1778K
代理商: M34551E8-XXXFP
4551 Group User’s Manual
APPLICATION
2-7
2.1 I/O pins
Fig. 2.1.2 Input timing of key scan
High
Low
D0
High
Low
High
Low
High
Low
D1
D2
D3
IAP0
Input of
SW13–SW16
IAP0
Switch of key input selection port (D0
→D1)
Waiting time for stabilizing until input
Reading of port (key input)
Key input cycle
Input of
SW1–SW4
Input of
SW9–SW12
Input of
SW5–SW8
Input of
SW1–SW4
Note: Output from port D is high-impedance state.
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