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參數(shù)資料
| 型號： | ST62E85BG1 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, UVPROM, 8 MHz, MICROCONTROLLER, CQFP80 |
| 封裝： | CERAMIC, QFP-80 |
| 文件頁數(shù)： | 53/78頁 |
| 文件大小： | 868K |
| 代理商： | ST62E85BG1 |
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Obsolete
Product(s)
- Obsolete
Product(s)
57/78
ST62T85B/E85B
LCD CONTROLLER-DRIVER (Cont”d)
Address Mapping of the Display Segments
The LCD RAM is located in the ST6285B data
space in two pages of 64 bytes from addresses
00h to 3Fh. The LCD forms a matrix of 48 segment
lines (columns) and 8 backplane lines (rows) or 40
segment lines and 11 or 16 backplane lines ac-
cording to the chosen operating mode. Each bit of
the LCD RAM is mapped to one dot of the LCD
matrix, as described in Figure 31. If a bit is set, the
corresponding LCD dot is switched on; if it is reset,
the dos is switched off.
If 1/8 duty cycle mode is selected (48 x 8 dot ma-
trix), only RAM page 1 is used for display data
storage. In this case page 2 is completely free for
common data storage.
If 1/16 duty cycle mode is selected (40 x 16 dot
matrix), RAM page 1 and 2 are used for display
data storage. In this case addresses 00 to 07 in
both pages are free for common data storage.
If 1/11 duty cycle mode is selected (40 x 11 dot
matrix), RAM pages 1 and 2 are used for display
data storage. In this case addresses 00 to 07 in
both pages and bits 3 to 7 in RAM page 2 are free
for common data storage.
In all display modes 16 bytes from address 38h to
3Fh in RAM pages 1 and 2 are free common data
storage.
After reset, the LCD RAM is not initialized and con-
tains arbitrary information. As the LCD control reg-
ister is reset, the LCD is completely switched off.
Figure 31. Addressing Mapping of the LCD RAM
1/11 MUX (48 x 11 = 528 dots
LCD-RAM Address
COM1
bit0
00
01
-
07
08
-
37
38
-
3E
3F
Page 1
COM2
bit1
COM3
bit2
COM4
bit3
COM5
bit4
COM6
bit5
COM7
bit6
COM8
bit7
COM9
bit0
00
01
-
07
08
-
37
38
-
3E
3F
Page 2
COM10
bit1
COM11
bit2
COM12
bit3
00
01
-
07
08
-
37
38
-
3E
3F
5bitx48
free data
storage
COM13
bit4
COM14
bit5
COM15
bit6
COM16
bit7
S
E
G
S
E
G
S
E
G
S
E
G
S
E
G
1
2
-8
9-
56
16 bytes free for
data storage
16 bytes free for
data storage
57
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