Specifications

7–36 EPSON
SED1234/35 Series
Instruction Setup Example (Reference Only)
(1) Initial setup
(Note 1)
(Note 1)
VDD-VSS power ON
Power regulation
Input of reset signal
Command status
• Static display control : Off
• Display on/off control : Off
• Power save : Off
• Power control : Off
• System reset : CG=0
• Others are undefined.
Waiting for 10 µsec or more
Command input: (Asterisk indicates any
command sequence.)
(1) System setup command
(*) Static display control command
(Valid in Standby mode only)
(*) Display on/off control command
• D: On (Display)
(*) Electronic volume register setup
• Data: (0, 0, 0, 0)
(*) Power save command
• PS: Off (Power save)
• O: On (Oscillation)
(6) RAM address setup
(7) Data writing
Waiting for 20 msec or more
Command input
(8) Power control commands
• P, VF, VC: On
Command input:
(9) Electronic volume register setup
• Data: Appropriate value
End of initialization
(2) Display mode
End of initialization
Input of RAM address setup command
Input of RAM (data) write command
Display of written data
Note 1: Commands (6) and (7) initialize the RAM. The display contents must first be set. The non-display area
must satisfy the following conditions (for RAM clear).
• DDRAM: Write the 20H data (character code).
• CGRAM: Write the 00H data (null data).
• Symbol register: Write the 00H data (null data).
As the RAM data is unstable during reset signal input (after power-on), null data must be written. If not,
unexpected display may result.