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參數(shù)資料
| 型號： | UPD17207GF |
| 廠商： | NEC Corp. |
| 英文描述： | 4-BIT SINGLE-CHIP MICROCONTROLLER WITH LCD CONTROLLER/DRIVER AND A/D CONVERTER FOR INFRARED REMOTE CONTROL TRANSMITTERS |
| 中文描述： | 4位單片機(jī)與LCD控制器/驅(qū)動器和A / D轉(zhuǎn)換器紅外遙控遞質(zhì) |
| 文件頁數(shù)： | 62/120頁 |
| 文件大小： | 516K |
| 代理商： | UPD17207GF |
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μ
PD17201A, 17207
62
Cautions 1.
The LCD clock is supplied from the watch timer; therefore, the LCD flickers if the watch timer
is reset during display. Do not reset the watch timer during display.
If the main clock and subclock are used, the source clock of the LCD is the subclock. When
the power is switched on, therefore, the LCD may flicker until the oscillation of the subclock
stabilizes. Make sure that a sufficiently long time elapses until the oscillation stabilizes
before turning on the LCD (it is recommended that all-light mode be used immediately after
power application).
The LCD display voltages (V
LCD0
, V
LCD1
, and V
LCD2
) become undefined momentarily on turning
ON/OFF power, reset, and setting or clearing the STOP mode. As a result, the LCD display
may be turned ON (blurring of the LCD). This symptom is conspicuous when only the main
clock is used or if the capacitance at the LCD display side is too high. To prevent this, take
the following measures.
Provide wait time of 1 frame cycle or longer until the voltage booster circuit is stopped
by the display mode register after the LCD display has been turned off.
Provide wait time of around 2 ms after the voltage booster circuit has been stopped until
the STOP instruction is executed.
2.
3.
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