參數(shù)資料
型號: HD66726
廠商: Hitachi,Ltd.
英文描述: Graphics LCD Controller/Driver with Key Scan Function(帶鍵掃描功能的圖形LCD控制器/驅(qū)動(dòng)器)
中文描述: 圖形液晶顯示控制器/鍵掃描功能(帶鍵掃描功能的圖形液晶顯示控制器/驅(qū)動(dòng)器驅(qū)動(dòng)程序)
文件頁數(shù): 57/117頁
文件大?。?/td> 1549K
代理商: HD66726
HD66726
57
Table 33
Key Scan Cycles for Each Operating Frequency
KF1
KF0
Key Scan Pulse Width
Key Scan Cycle
0
0
0.16 ms
0.64 ms (32 clock cycles)
0
1
0.32 ms
1.28 ms (64 clock cycles)
1
0
0.64 ms
2.56 ms (128 clock cycles)
1
Note:
1
1.28 ms
5.12 ms (256 clock cycles)
The data is a value obtained when the oscillation frequency (fosc) is 50 kHz. The value depends on
the oscillation frequency.
2.56 ms
0.64 ms
KST0
Key scan cycle
KST1
KST2
KST3
Figure 27 Key Strobe Output Timing (KF1/0 = 10, fcp/fosc = 50 kHz)
Key matrix
HD66726
Key state fetch
Key strobe
Detail
KIN5
KIN4
KIN3
KIN2
KIN1
KIN0
KST0
KST1
KST2
KST3
D
30
D
31
D
32
D
33
D
34
D
35
D
20
D
21
D
22
D
23
D
24
D
25
D
10
D
11
D
12
D
13
D
14
D
15
D
00
D
01
D
02
D
03
D
04
D
05
KIN6
D
36
D
26
D
16
D
06
KIN7
D
37
D
27
D
17
D
07
Figure 28 Key Scan Configuration
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