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参数资料
| 型号： | ST624XB-DBE |
| 厂商： | 意法半导体 |
| 英文描述： | REAL TIME EMULATION DEVELOPMENT TOOLS FOR ST6 MCU FAMILY |
| 中文描述： | 实时仿真开发工具，ST6单片机系列 |
| 文件页数： | 49/74页 |
| 文件大小： | 733K |
| 代理商： | ST624XB-DBE |
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ST62T46B/E46B
LCD CONTROLLER-DRIVER (Continued)
4.5.1 Multiplexing ratio and frame frequency
setting
Up to 4 common plates COM1..COM4 can be
used for multiplexing ratio ranging from 1/1 to 1/4.
The selection is made by the bits DS0 and DS1 of
the LCDCR as shown in the
Table 16
.
Table 16. 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 17
).
Table 17. LCD Frame Frequency Selection
4.5.2 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 derivated
from the VLCD value through internal resistive di-
vision. This internal divider is disabled when the
LCD driver is OFF in order to avoid consumption
on VLCD pin.
The 1/3 VLCD and 2/3 VLCD values used in 1/1,
1/3 and 1/4 multiplexing ratio modes are internally
generated and issued on external pins, while 1/2
VLCD value used in 1/2 mode is obtained by exter-
nal connection of the 1/3VLCD and 2/3VLCD pins
(
Figure 26
).
Figure 26. Bias Config for 1/2 Duty
Figure 27. Typical Current consumption on
VLCD Pin (25°C, no load, fLCD=512Hz, mux=1/3-
1/4)
Note
: For display voltages V
LCD
< 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.
DS1 DS0
0
0
1
1
Display Mode
1/4 mux.ratio
1/1 mux.ratio
1/2 mux.ratio
1/3 mux.ratio
Active backplanes
COM1, 2, 3, 4
COM1
COM1, 2
COM1, 2, 3
0
1
0
1
LF2
LF1
LF0
Base
f
LCD
(Hz)
Frame Frequency f
F
(Hz)
1/1
mux.
ratio
ratio
64
32
85
43
128
64
171
85
256
128
341
171
512
256
Reserved
1/2
mux.
1/3
mux.
ratio
21
28
43
57
85
114
171
1/4
mux.
ratio
16
21
32
43
64
85
128
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
64
85
128
171
256
341
512
V
LCD
V
LCD1/3
V
SS
V
LCD2/3
R
H
R
H
R
H
LCDOFF
VR01367
I
LCD
(μA)
V
LCD
(V)
VR01838
70
60
50
40
30
20
10
3
4
5
6
7
8
9
10
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相关代理商/技术参数 |
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|---|---|
| ST624XB-KIT | 制造商:未知厂家 制造商全称:未知厂家 功能描述:STARTER KIT DATASHEET FOR ST624X |
| ST624XB-KIT/110 | 功能描述:开发板和工具包 - 其他处理器 ST624X Starter Kit RoHS:否 制造商:Freescale Semiconductor 产品:Development Systems 工具用于评估:P3041 核心:e500mc 接口类型:I2C, SPI, USB 工作电源电压: |
| ST624XB-KIT/UK | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:ST62 KIT |
| ST6252 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT OTP/EPROM MCUs WITH A/D CONVERTER, AUTO-RELOAD TIMER AND EEPROM |
| ST6252BB1 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT OTP/EPROM MCUs WITH A/D CONVERTER, AUTO-RELOAD TIMER AND EEPROM |
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