Specifications

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EPSON 8–31

SED1240 Series

SED1240

Series

Display ON/OFF control

Function: Sets both display and cursor ON/OFF, and

extended register access.

• Display ON/OFF is specified by setting D.

D = 0 : Display ON

D = 1 : Display ON

• Character blink ON/OFF at the cursor position is

specified by setting B. However, when the cursor is

OFF, this bit is invalidated.

B = 0 : Cursor blink OFF

B = 1 : Cursor blink ON

• Cursor ON/OFF is specified by setting C.

C = 0 : No display of cursor

C = 1 : Display of cursor

• Extended register access is specified by setting RE.

RE = 0 : Extended register OFF

RE = 1 : Extended register ON

• The relation between C/B register and cursor display

is shown in the following table.

C B Cursor display

0 0 No display (fixed)

0 1 No display (fixed)

1 0 Display of under-bar cursor

1 1 Alternate display of display characters

and black-and-white reversed display

characters

• Example of cursor display

(C, B) = (0, 0) (1, 0) (1, 1)

Blink

The cursor display position is indicated by the address

counter. Accordingly, when moving the cursor, change

the address counter value by the RAM address set

command or the auto increment by the RAM data write

command.

To display the under-bar cursor when character data

(CGRAM) at the cursor position, the position

corresponding to the cursor position will be displayed in

black-and-white reverse form.

If the address counter is set to the symbol register

position at (C, B) = (1, 1), symbols can be caused to blink

selectively (every 5 dots because symbols correspond to

characters).

Power save

Function: Controls the oscillating circuit and sets and

resets the power save mode and the sleep

mode.

• Power save mode ON/OFF is specified by setting PS.

PS = 0 : Power save OFF (reset)

PS = 1 : Power save ON (set)

• Oscillating circuit ON/OFF is specified by setting O.

O = 0 : Oscillating circuit OFF

(stop of oscillation)

O = 1 : Oscillating circuit ON

(start of oscillation)

RE A0 WR D7 D6 D5 D4 D3 D2 D1 D0

0/1000011CBRED

RE A0 WR D7 D6 D5 D4 D3 D2 D1 D0

0/1000100**OPS

∗ : Don't Care