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參數(shù)資料
| 型號(hào)： | S-4544A |
| 廠商： | Seiko Instruments Inc. |
| 英文描述： | LCD Controller-Driver With Built-in 8-Bit and Serial Interfaces(內(nèi)置8位和串行接口的LCD控制器-驅(qū)動(dòng)器) |
| 中文描述： | LCD控制器與- 8內(nèi)置驅(qū)動(dòng)器位和串行接口（內(nèi)置8位和串行接口的液晶顯示控制器-驅(qū)動(dòng)器） |
| 文件頁數(shù)： | 32/39頁 |
| 文件大?。?/td> | 237K |
| 代理商： | S-4544A |
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LCD Controller-Driver
S-4544A
Seiko Instruments Inc.
31
Note 4
Pin s D0 to D7 during read.
Note 5
Pins A0, CSX, RDX, R/WX,C 86, P/SX, OSC1, FNC1 and FNC2.
Note 6
Pins D0 to D7 during write and high-impedance.
Note 7
ON resistance between LCD drive output pins (SEG1 to SEG128, COM1 to 32, COMICN1, and 2) and
LCD drive bias voltage pins (V1, V2, V3, V4). Using the external LCD power supply, measure the
resistance at a 0.1-V difference from the LCD drive output pin after applying 1/2 voltage of V5 to the LCD
drive bias voltage pin.
Note 8
Power save state. When turning the input pin to
“
Floating,
”
the through current flows and will eventually
the power save effect may be reduced.
Note 9
Shows the current consumption during display including CR oscillation.
It does not include the current consumed by the booster, LCD supply voltage adjustment circuit, voltage
regulator, LCD bias resistor when using the external LCD power supply. The LCD drive output pin is no
load. The current consumed by the LCD panel and wiring capacitor is not included. Measure it without
access from the MPU. The current consumed by the external LCD power supply and external bias resistor
and other is not included.
Note 10
The current consumption while the checkered pattern display data are being written from the MPU. The
CR oscillation is measured while the CR oscillating circuit stops. The voltage level of the input signal is
the V
IH
=V
DD
and V
IL
=V
SS
. When the input signal voltage is in the middle level, the current consumption
may be increased. When the display data is written from the MPU during display, the state is changed to
I
SS1
+I
SS2
.
Note 11
Shows the standard value at oscillating resistor 1 M
. Determine appropriate oscillating frequency so as
not to be in synchronization with the frame frequency and other frequency such as the fluorescent lamps.
Note 12
Shows the wait time from when the power voltage rises to 80% of the specified voltage to when the
command input becomes available.
Note 13
The operating voltage range of the booster.
Note 14
Shows the operating voltage range of the LC voltage adjustment circuit, voltage follower, and LCD bias
resistor. The operating voltage range differs depending upon each bias setting value. To adjust V5 with
the LCD voltage adjustment circuit, it is necessary to set the voltage within the bias voltage.
|V
OUT
| - | V5|
≥
0.2V
Note 15
The operating voltage range of the LCD driver after the voltage follower functions. Also, it shows the
voltage range of V1 to V5 supplied from the external LCD power supply circuit.
Note 16
Shows the value of the current consumed by the booster, LCD voltage adjustment circuit, voltage follower,
LCD bias resistor, and LCD driver. It does not include the value IRREG=V5/(R1+R2+R3) of the current
flowing through external resistors R1, R2, and R3. Set the command fine adjustment data to 1000.
Outputs the checkered patterns from the LCD drive output pin. The pin is measured at
“
Open.
”
Current
consumption of the IC during display is I
SSL
+I
SS1
.
Note 17
The built-in LCD power supply circuit stops when FNC1 and 2 are
“
H.
”
Current consumption only for the
LCD driver. Outputs the checkered patterns from the LCD drive output pin. The pin is measured at
“
Open.
”
Current consumption of the IC during display is IV5+I
SS1
.
When using the external power supply, stop the built-in power supply circuit which does not need to be
operated with pins FNC1 and 2 to prevent the IC from being broken due to a shorting of the internal
power supply.
Note 18
The reference voltage differs depending upon the temperature coefficient selected with the corresponding
command.
Note 19
Constant current which flows into the LCD Voltage Command Fine Adjustment Circuit of the IC, for the
Fine adjustment data (1111).
Increasing the Fine adjustment data by 1 bit, V5 increases by Rb
×
I
REF
/ 15.
Note 20
For the Chips deliveries, chips are delivered after they satisfy their LCD drive bias voltages are
±
0.08V in
the delivery testing at 25
°
C.
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