參數(shù)資料
型號: MC68HC05L25PB
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQFP52
封裝: TQFP-52
文件頁數(shù): 6/152頁
文件大?。?/td> 897K
代理商: MC68HC05L25PB
Terminal Description
MC68HC05L25 Data Sheet, Rev. 3.1
Freescale Semiconductor
103
The LCD uses the three bias voltages typically as follows:
1.
VLCD1 = VDD — 1/3 VLCDA (VLCDA is the ON voltage for the LCD modules.)
2.
VLCD2 = VDD — 2/3 VLCDA (Usually, VLCDA ≤ VDD is used.)
3.
VLCD3 = VDD — VLCDA = VLCD (VLCD is the external pin.)
The three voltages shown above are arranged so that the external voltages will have a VLCD1 > VLCD2 >
VLCD3 relationship in a voltage divider configuration.
11.4.2 Backplane Drivers (BP0–BP3)
Pins BP0–BP3 are the output terminals for the backplane drivers.
These are connected to the backplane of the LCD panel. Depending on the duty, the waveforms in Figure
11-5 and Figure 11-6 appear on the backplane pins.
11.4.3 Frontplane Drivers
Pins FP0–FP24 are the output terminals for the frontplane drivers. These are connected to the frontplane
of the LCD panel. Depending on the content of the data latch, the waveforms in Figure 11-7 and Figure
11-8 appear on the frontplane drivers.
.
Figure 11-5. 1/3 Duty LCD Backplane Driver Waveforms
1FRAME
DUTY = 1/3
BP0
VDD
VLCD1
VLCD3
VDD
VLCD2
VLCD3
VDD
VLCD1
VLCD2
VLCD3
VLCD2
VLCD1
BP1
BP2
1. BP3 is not used.
2. At 1/3 duty, 1FRAME has three times the cycle of LCD waveform base clock.
NOTES:
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