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參數(shù)資料
| 型號： | UPD17202AGF-011-3BE |
| 廠商： | NEC Corp. |
| 元件分類： | 圓形連接器 |
| 英文描述： | Circular Connector; No. of Contacts:56; Series:MS27467; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:25; Circular Contact Gender:Pin; Circular Shell Style:Straight Plug; Insert Arrangement:25-4 RoHS Compliant: No |
| 中文描述： | 4位單片機，帶有LCD控制器/驅動器和鍵掃描電路軟板前面板控制器 |
| 文件頁數(shù)： | 8/28頁 |
| 文件大?。?/td> | 131K |
| 代理商： | UPD17202AGF-011-3BE |
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8
μ
PD17202AGF-011
3. KEY SCAN
3.1 Key Scan Function
Key scanning is started when a key data output command is executed.
The INT pin (pin 35) goes high when key scanning has ended.
The INT pin goes low when the LOAD pin (pin 28) goes high.
Figure 3-1. Timing Chart of Key Scanning
KS0
KS1
KS2
KS3
KS4
INT
Key data output
command
Scanning ends
LOAD pin rises
Key data output
command
1.6 - 1.9 ms
(2.8 - 3.4 ms)
Note
50 - 60 s
Note
The value in brackets ( ) is when “display data input + key data output” is executed.
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