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3: COMMANDS AND COMMAND REGISTERS
[Parameters P7, P8]
AP
Defines the number of memory addresses in the X direction of a virtual screen.
SLEEP IN
C
When this command is input, the S1D13700 blanks the display for at least a one-frame period,
then stops all internal operations including clock oscillation before entering sleep mode. At this
time, the LCD unit sends OFF data to the X driver while simultaneously sending the YDIS
signal to the Y driver to turn the bias voltage off. Therefore, in no case will unexpected display
remain on the screen when the liquid crystal is powered off by the YDIS signal.
In sleep mode, the S1D13700 registers retain the original state before entering sleep mode.
Moreover, the display memory control pins are fixed high or low to maintain the integrity of
data stored in display memory.
To restore the S1D13700 from sleep mode, write the command and one parameter (P1) of the
SYSTEM SET to the S1D13700 once to immediately wake up the S1D13700. In direct
interface mode, the S1D13700 can be restored from sleep mode by clearing the SleepIn bit.
However, display memory cannot be accessed immediately after exiting sleep mode. The
display RAM space (0000h–7FFFh) can be accessed by first accessing any other register once.
To restore display, execute the DISP ON command immediately after exiting sleep mode.
Regardless of whether the S1D13700 is directly or indirectly interfaced, the entire screen must
be set to the ON state before entering sleep mode. When in indirect interface mode, issue the
DISP ON command. When in direct interface mode, set the DispOn bit to 1 before entering
sleep mode.
<Indirect mode>
MSB
D7
C
0
Note: 1. The YDIS signal goes low at a time equivalent to one to two frames after the sleep command
is written. When the YDIS signal goes low, all Y driver outputs are forcibly brought to an inter-
24
MSB
D7
D6
APL
AP7
AP6
APH
AP15
AP14
HEX
Number of memory
addresses per line
APH
APL
0 0
0 0
0 0
0 1
• •
• •
• •
• •
0 0
5 0
• •
• •
• •
• •
F F
F E
F F
F F
D6
D5
D4
D3
1
0
1
0
D5
D4
D3
AP5
AP4
AP3
AP13
AP12
AP11
[AP]
0
1
•
•
80
•
•
16
2
-2
16
2
-1
LSB
D2
D1
D0
0
1
1
EPSON
D2
D1
AP2
AP1
AP10
AP9
Display screen
C/R
Defined area of display memory
AP
<Direct mode>
Address
Register name
0x8008
r_SleepIn
bit0 : SleepIn
S1D13700 Technical Manual
LSB
D0
AP0
AP8
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