S1D12200 Epson Electronics America, Inc., S1D12200 Datasheet - Page 86

• Manufacturer Part Number: S1D12200
• Description: S1d12000 Series Lcd Driver Ic Technical Manual Technical Manual
• Manufacturer: Epson Electronics America, Inc.

S1D12205 Series
Electronic Control RAM (Register)
The S1D12205 SERIES has the electronic control
functions to control LCD drive voltages and to adjust the
LCD display density. One of 32-state LCD voltages can
be selected when the 5-bit data is written in the Electronic
LED RAM (Register)
The S1D12205 Series has the LED drive functions to
drive the LCD by controlling the LE1 and LE2 pins.
The following defines the LE1 and LE2 pin state
depending on the TIM1, TIM2, LED1 and LED2 set
values.
3–24
Electronic
Control
Function
LED ON/OFF
Timer
Note: Do not use address 29H as it can be used for IC chip test only.
Function
*
: Unused
: =V
: Unused
Note: When this function is used, minimize power supply and power
REG
LED Register Set Value
/95 (1/4biased)
TIM2
TIM1
28H
29H
0
0
1
1
cable impedance to avoid IC misoperation due to large current.
RAM Address
RAM Address
2AH
LED2
LED1
0
1
0
1
D7
*
*
*
*
*
*
*
D7
LE = HIGH impedance
LE = LOW
Keeps LE LOW approximately 15 sec
after input of Display ON command.
LE = LOW
EPSON
* *
* *
* *
* *
* *
* *
* *
Electronic Control Data
Output Status (LE1, LE2)
Control RAM.
The following provides the relationship between the
RAM address and write data by electronic control setup.
The following provides the relationship between the
RAM address and write data by LED register setup.
*
0
0
0
1
1
1
LED Register Data
0
0
0
1
1
1
*
0
0
0
1
1
1
0
0
1
0
1
1
TIM2 TIM1 LED2 LED1
D3
D0
0
1
0
1
0
1
Status
29
30
31
0
1
2
D2
V
V
V
V
V
V
For test
D1
REG
REG
REG
REG
REG
REG
V
EV
-0
-
-2
-29
-30
-31
D0
Rev. 1.1