S1D1 Epson Electronics America, Inc., S1D1 Datasheet - Page 183

• Manufacturer Part Number: S1D1
• Description: LCD Controller-driver With Built-in Character ROM
• Manufacturer: Epson Electronics America, Inc.

S1D15400 Series
(12) End
Cancels read-modify-write mode and restores the contents of the column address register to their value prior to the receipt
of the read-modify-write command.
(13) Reset
This command resets the display start line register, column address counter, and page address register to their initial status.
This command does not affect on the display data RAM. For details, see the Reset circuit of the functional block
explanation.
The counter and registers are reset after the Reset command has been entered.
When the power supply is turned on, a Reset signal is entered in the RES pin. The Reset command cannot be used instead
of this Reset signal.
Power Save (compound command)
The system enters the power save state by switching the static drive on in the display off state, reducing the consumed
current almost to static current. The internal state in the power save state is as follows:
• The LCD drive is stopped, and the segment and common drivers output the V
• Oscillating external clock entry is inhibited, and OSC2 becomes floating.
• The display data and the operation mode are held.
The power save state can be canceled by switching the display on or static drive off.
When the LCD drive voltage level is supplied by an externally-equipped resistance dividing circuit, the current flowing
through the resistor must be cut by means of the power save signal.
6–18
Power save signal
Column address
A
A
0
0
0
0
V
DD
RD
RD
1
1
R/W
R/W
WR
WR
0
0
Read/modify/write mode set
N
D
D
1
1
7
7
VSSH
N+1
R
R
R
D
D
1
1
6
6
EPSON
V
V
V
V
N+2
1
2
3
D
DD
D
1
1
5
5
D
D
0
0
4
4
S1D15400
D
D
0
1
3
3
N+m
DD
D
D
0
1
2
2
level.
D
D
1
1
N
End
1
1
Return
D
D
0
0
0
0
E2H
EEH
Rev. 1.0