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参数资料
| 型号： | ST6280BQ6/XXX |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP100 |
| 封装： | PLASTIC, QFP-100 |
| 文件页数： | 54/80页 |
| 文件大小： | 934K |
| 代理商： | ST6280BQ6/XXX |
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Obsolete
Product(s)
- Obsolete
Product(s)
58/80
ST62T80B/E80B
LCD CONTROLLER-DRIVER (Cont”d)
4.7.1 Multiplexing ratio and frame frequency
setting
Up to 16 common plates COM1..COM16 can be
used for multiplexing ratio of 1/8, 1/11 and 1/16.
The selection is made by the bits MUX11 and
MUX16 of the LCDCR as shown in the Table 21.
Table 21. Multiplexing ratio
If the 1/1 multiplexing ratio is chosen, LCD seg-
ments are refreshed with a frame frequency Flcd
derived from 32Khz clock with a division ratio de-
fined by the bits LF0..LF2 of the LCDCR.
When a higher multiplexing ratio is set, refreshment
frequency is decreased accordingly (Table 22).
Table 22. LCD Frame Frequency Selection
4.7.2 Segment and common plates driving
LCD panels physical structure requires precise
timings and stepped voltage values on common
and segment outputs. Timings are managed by
the LCD controller, while voltages are generated
through an external resistive bridge. In 1/11 and
1/8 multiplexing mode, VLCD 2/5 and VLDCD 3/5
are shorted as seen on Figure 32.
Figure 32. Bias Config for 1/2 Duty
Note: For display voltages VLCD < 4.5V the resis-
tivity of the divider may be too high for some appli-
cations (especially using 1/3 or 1/4 duty display
mode). In that case an external resistive divider
must be used to achieve the desired resistivity.
MUX11 MUX16
Display Mode
Active backplanes
0
1/8 mux.ratio
COM1-8
1
0
1/11 mux.ratio
COM1-16
0
1
1/16 mux.ratio
COM1-16
1
-
Reserved
LF1
LF0
Base
fLCD
(Hz)
Frame Frequency fF (Hz)
1/8
mux.ratio
1/11
mux.ratio
1/16
mux.ratio
0
1
128
93
64
1
0
170
124
85
0
256
186
128
1
512
372
256
1
Reserved
VLCD
VLCD 4/5
VLCD 3/5
VLCD 2/5
VLCD 1/5
GND
C4
C3
C2
C1
C2
C3
GND
VLCD
R5
R4
R3
R2
R1
R4
R3
R2
R1
1/4 bias
(1/11, 1/8 MUX)
R2 to R5 should be 1K
to 200K
C1 to C5 should be 0F to 0.3 F
VR001662
VLCD 4/5
VLCD 3/5
VLCD 2/5
VLCD 1/5
(1/16 MUX)
1/5 bias
C5
Contrast
VS
Contrast
C4
58
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相关代理商/技术参数 |
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|---|---|
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