參數(shù)資料
型號： HD66728
廠商： Hitachi,Ltd.
英文描述： 112 x 80-dot Graphics LCD Controller/Driver(112 x 80點圖形LCD控制器)
中文描述： 112 × 80點圖形LCD控制器/驅(qū)動器（112 × 80點圖形液晶顯示控制器）
文件頁數(shù)： 16/138頁
文件大?。?/td> 2158K
代理商： HD66728
HD66728
16
Table 2
Pin Functional Description (cont)
Signals
Number of
Pins
I/O
Connected to
Functions
VLOUT
3
O
V
pin/booster
capacitance
Potential difference between Vci and GND is triple- to
five-times-boosted and then output. Magnitude of
boost is selected by instruction.
C1+, C1–
8
—
Booster
capacitance
External capacitance should be connected here for
boosting.
C2+, C2–
6
—
Booster
capacitance
External capacitance should be connected here when
using the triple or more booster.
C3+, C3–
6
—
Booster
capacitance
External capacitance should be connected here when
using the quadruple and five-times booster.
C4+, C4–
6
—
Booster
capacitance
External capacitance should be connected here when
using the five-times booster.
RESET*
1
I
MPU or external
R-C circuit
Reset pin. Initializes the LSI when low.
OPOFF
1
I
V
CC
or GND
Turns the internal operational amplifier off when
OPOFF = V
, and turns it on when OPOFF = GND.
If the amplifier is turned off (OPOFF = V
), V1 to V5
must be supplied to the V1OUT to V5OUT pins.
VccDUM
1
O
Input pins
Outputs the internal V
level; shorting this pin sets
the adjacent input pin to the V
CC
level.
Outputs the internal GND level; shorting this pin sets
the adjacent input pin to the GND level.
GNDDUM
1
O
Input pins
Dummy
5
—
—
Dummy pad. Must be left disconnected.
TEST
1
I
GND
Test pin. Must be fixed at GND level.
VTEST1
1
I
GND or V
CC
Adjusts the driving capability of the internal
operational amplifier for the LCD. This signal enters
the normal drive mode in the GND side, and it enters
the high-power drive mode in the V
side. When the
display quality is not sufficient, use the high-power
drive mode even though the power-consumption
current is large.
VTEST2
1
—
—
Test pin. Must be left disconnected.
VTEST3
1
I
V
CC
or GND
Adjusts the driving capability of the internal
operational amplifier for the LCD. This signal enters
the normal drive mode or high-power mode in the
GND side according to the VTEST1 pin setting, and it
enters the low-power drive mode in the V
side. Use
this signal in the low-power mode so that the display
quality is not lowered.
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