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參數(shù)資料
| 型號： | HCD66717A13BP |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | TRANSISTOR,BJT,NPN,700V V(BR)CEO,8A I(C),TO-247VAR |
| 中文描述： | （低功耗點(diǎn)陣液晶顯示控制器/驅(qū)動(dòng)器） |
| 文件頁數(shù)： | 61/90頁 |
| 文件大小： | 716K |
| 代理商： | HCD66717A13BP |
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HD66717
513
Segment Display and Annunciator Display
The HD66717 provides both segment display, which is driven by the multiplexing method, and
annunciator display, which is driven statically. Annunciator display is driven at a logic operating voltage
(V
CC
– AGND) and is thus also available while the LCD drive power supply is turned off. Accordingly,
annunciator display is suitable for displaying marks during system standby, when it is desirable to reduce
current consumption. It is available in sleep mode, where internal multiplexing operations for character or
segment display are halted. If an alternating signal is supplied to the EXM pin, it is also available in
standby mode, where the internal R-C oscillator is halted. Here, AGND must be equal to or above the
GND level.
Note that annunciator display cannot share character display drivers SEG and COM but require special
drivers ASEG and ACOM that require long routing.
Tables 21 to 23 illustrates segment display and annunciator display.
Table 21
Comparison between Segment Display and Annunciator Display
Item
Segment Display
Annunciator Display
Number of driven elements
20 each by COMS1 and COMS2
10
Blinking
Impossible
Possible
Segment drivers
SEG1–SEG60
(shared with character display)
ASEG1–ASEG10
(independent of character display)
Common drivers
COMS1, COMS2
ACOM
LCD power supply
V
– V5
(LCD power supply necessary)
V
– AGND
(LCD power supply unnecessary)
Normal mode display
Display possible together with
character display by multiplexing drive
Display possible by static drive
Sleep mode display
Impossible
(SEG and COM output V
CC
)
Impossible
(SEG and COM output V
CC
)
Possible by static drive
Standby mode display
(without oscillation)
Possible by supplying alternating
signal to the EXM pin
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