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參數(shù)資料
| 型號： | HD66702R |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver with Key Scan Function |
| 中文描述： | 低功耗點陣液晶顯示控制器/鍵掃描功能驅(qū)動程序 |
| 文件頁數(shù)： | 21/97頁 |
| 文件大?。?/td> | 513K |
| 代理商： | HD66702R |
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HD66727
21
SEGRAM has a capacity of 8
×
6 bits, for controlling the display of a maximum of 40 (48 in the 6-dot font
width) icons and marks. While COMS1 and COMS2 outputs are being selected, SEGRAM is read and
segments (icons and marks) are displayed by a multiplexing drive method (20 segments each during
COMS1 and COMS2 selection).
Bits in SEGRAM corresponding to segments to be displayed are directly set by the MPU, regardless of the
contents of DDRAM and CGRAM.
Tables 9 and 10 illustrate the correspondence between SEGRAM addresses and driver signals.
Table 9
Correspondence between Segment Display SEGRAM Addresses (ASEG) and Driver
Signals in the 5-Dot Font Width
ASEG Address
Segment Signals
Common
Signal
MSB
LSB D7
D6
D5
D4
D3
D2
D1
D0
1
0
0
0
*
*
*
SEG1,
SEG21,
SEG41
SEG2,
SEG22,
SEG42
SEG3,
SEG23,
SEG43
SEG4,
SEG24,
SEG44
SEG5,
SEG25,
SEG45
COMS1
1
0
0
1
*
*
*
SEG6,
SEG26,
SEG46
SEG7,
SEG27,
SEG47
SEG8,
SEG28,
SEG48
SEG9,
SEG29,
SEG49
SEG10,
SEG30,
SEG50
COMS1
1
0
1
0
*
*
*
SEG11,
SEG31,
SEG51
SEG12,
SEG32,
SEG52
SEG13,
SEG33,
SEG53
SEG14,
SEG34,
SEG54
SEG15,
SEG35,
SEG55
COMS1
1
0
1
1
*
*
*
SEG16,
SEG36,
SEG56
SEG17,
SEG37,
SEG57
SEG18,
SEG38,
SEG58
SEG19,
SEG39,
SEG59
SEG20,
SEG40,
SEG60
COMS1
1
1
0
0
*
*
*
SEG1,
SEG21,
SEG41
SEG2,
SEG22,
SEG42
SEG3,
SEG23,
SEG43
SEG4,
SEG24,
SEG44
SEG5,
SEG25,
SEG45
COMS2
1
1
0
1
*
*
*
SEG6,
SEG26,
SEG46
SEG7,
SEG27,
SEG47
SEG8,
SEG28,
SEG48
SEG9,
SEG29,
SEG49
SEG10,
SEG30,
SEG50
COMS2
1
1
1
0
*
*
*
SEG11,
SEG31,
SEG51
SEG12,
SEG32,
SEG52
SEG13,
SEG33,
SEG53
SEG14,
SEG34,
SEG54
SEG15,
SEG35,
SEG55
COMS2
1
1
1
1
*
*
*
SEG16,
SEG36,
SEG56
SEG17,
SEG37,
SEG57
SEG18,
SEG38,
SEG58
SEG19,
SEG39,
SEG59
SEG20,
SEG40,
SEG60
COMS2
Notes: 1. When the SFT pin is grounded, the SEG1 pin output is connected to the far left of the LCD
panel, and when the SFT pin is high, the SEG60 pin output is connected to the far left.
2. SEG1 to SEG20 data is identical to SEG21 to SEG40 and SEG41 to SEG60 data.
3. The lower five bits (D4 to D0) of SEGRAM data determine on or off display of each segment. A
segment is selected (turned on) when the corresponding data is 1, and is deselected (turned off)
when the corresponding data is 0. The upper three bits (D7 to D5) are invalid.
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