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參數(shù)資料
| 型號： | HCD66727A04BP |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver with Key Scan Function |
| 中文描述： | 低功耗點陣液晶顯示控制器/鍵掃描功能驅(qū)動程序 |
| 文件頁數(shù)： | 13/97頁 |
| 文件大?。?/td> | 513K |
| 代理商： | HCD66727A04BP |
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HD66727
13
Table 3
Pin Functional Description (cont)
Signal
Number of
Pins
I/O
Connected to
Function
SEG1/60–
SEG60/1
60
O
LCD
Segment output signals for segment-icon display and
character display. In the sleep mode (SLP = 1) or
standby mode (STB = 1), all pins output V
level.
The SGS bit can change the shift direction of the
segment signal. For example, if SGS = 0, SEG1/60 is
SEG1. If SGS = 1, SEG1/60 is SEG60.
ACOM
1
O
LCD
Common output signal for annunciator display; can drive
display statically between V
and AGND levels; outputs
V
CC
level while annunciator display is turned off (DA = 0).
Segment output signals for annunciator display; can
drive display statically between V
and AGND levels;
output V
CC
level while annunciator display is turned off
(DA = 0).
ASEG1–
ASEG12
12
O
LCD
V2, V3
2
I
Open or short-
circuited
V2 and V3 are voltage levels for the internal operational
amplifiers; can drive LCD with 1/4 bias when V2 and V3
are short-circuited and with 1/6 bias when they are left
disconnected.
VREFP,
VREF,
VREFM
3
I
Open or short-
circuited
Adjusts the driving capability of the internal operational
amplifiers according to the LCD power suppoly voltage.
LCD Power Supply
Voltage (V
CC
–V
EE
)
V
CC
–V
EE
: 3V–5V
Pin Settings VREF,
VREFP, and VREFM
Only VREF and VREFP
shorted
All pins open
All pins shorted
Only VREF and VREFM
shorted
V
CC
–V
EE
: 4V–6V
V
CC
–V
EE
: 5V–8V
V
CC
–V
EE
: 7V or more
V1OUT–
V5OUT
5
I or O
Open or
external
bleeder-resistor
Used for output from the internal operational amplifiers
when they are used (OPOFF = GND); when amplifiers'
driving capability is insufficient, attach a capacitor to
stabilize the output. Especially these capacitors for
V1OUT and V4OUT must be attached in 1/26 duty and
1/34 duty. When the amplifiers are not used (OPOFF =
V
), V1 to V5 voltages can be supplied to these pins
externally.
V
EE
V
CC
, GND
AGND
2
—
Power supply
GND power supply for LCD drive. V
CC
– V
EE
≤
13V.
V
CC
: +2.4V to +5.5V; GND (logic): 0V
Low level power supply for annunciator display; can
adjust contrast of annunciators; AGND
≥
GND.
8
—
Power supply
1
—
Power supply
OSC1,
OSC2
2
—
Oscillation-
resistor or clock
For R-C oscillation, connect an external resistor. For
external clock supply, input clock pulses to OSC1.
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