參數(shù)資料
型號: AK4184
廠商: Asahi Kasei Microsystems Co.,Ltd
英文描述: TSC with Keypad Scanner and GPIO Expander
中文描述: 臺(tái)糖與鍵盤掃描儀和GPIO擴(kuò)展
文件頁數(shù): 32/36頁
文件大?。?/td> 597K
代理商: AK4184
[AK4184]
MS0603-E-00
2007/04
32
Keypad Scanner Flowchart
1. Host Scan
Keypad
Touch
Read
KPDATA1,2
Register
KEYIRQN pin
Low
Start Clock
BUSY pin
High
BUSY pin
Low
Start
Scanning &
Debouncing keys
Store scan results
in KPDATA1, 2
Register
Stop Clock
KEYIRQN pin
High
Done
Yes
No
Write
KPScanInitiate
Register
Figure 19. Keypad scanner sequence initiated by Host command
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