參數(shù)資料
型號(hào): HD66728
廠商: Hitachi,Ltd.
英文描述: 112 x 80-dot Graphics LCD Controller/Driver(112 x 80點(diǎn)圖形LCD控制器)
中文描述: 112 × 80點(diǎn)圖形LCD控制器/驅(qū)動(dòng)器(112 × 80點(diǎn)圖形液晶顯示控制器)
文件頁數(shù): 65/138頁
文件大?。?/td> 2158K
代理商: HD66728
HD66728
65
Table 27
Key Scan Cycles for Each Operating Frequency
KF1
KF0
Key Scan Pulse Width
Key Scan Cycle
0
0
0.2 ms
0.8 ms (64 clock cycles)
0
1
0.4 ms
1.6 ms (128 clock cycles)
1
0
0.8 ms
3.2 ms (256 clock cycles)
1
Note:
1
1.6 ms
6.4 ms (512 clock cycles)
The data is a value obtained when the oscillation frequency (fosc) is 80 kHz. The value depends on
the oscillation frequency.
3.2 ms
0.8 ms
KST0
Key scan control
KST1
KST2
KST3
Figure 31 Key Strobe Output Timing (KF1/0 = 10, fcp/fosc = 80 kHz)
Key matrix
HD66728
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 32 Key Scan Configuration
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