SC802A datasheet(10/17 Pages) ETC2

10 / 17 page

SC802A

VER2.1

Akihabara Inc. www.akiba-tech.com

Page 10 of 10

c) Instruction description

Control and display instructions will show in details as following:

c.1) Clear Display

R/W

It clears the whole display and sets display data RAM's address 0 in address counter.

c.2) Return Home

R/W

X: Do not care (0 or 1)

It sets display data RAM's address 0 in address counter and display returns to its original position. The cursor or blink goes to the

display (to the 1st line if 2 lines are displayed). The contents of the Display Data RAM do not change.

c.3) Entry Mode Set

During writing and reading data, it sets cursor move direction and shifts the display.

R/W

I/D

I/ D = 1: Increment, I / D = 0: Decrement. S = 1: The display shift,

S = 0: The display does not shift

S= 1

I/D= 1

It shifts the display to the left

S= 1

I/D=0

It shifts the display to the right

c.4) Display On/Off Control

R/W

D = 1: Display on, D = 0: Display off C = 1: Cursor on , C = 0: Cursor off

B = 1: Blinks on, B= 0: Blinks off

c.5) Cursor or Display Shift

Without changing DD RAM's daters, it can move cursor and shift display

R/W

S/C

R/L

S/C

R/L

Description

Address Counter

Shift cursor to the left

AC = AC - 1

Shift cursor to the right

AC = AC + 1

Shift display to the left. Cursor follows the display shift

AC=AC

Shift display to the right. Cursor follows the display shift

AC=AC

c.6) Function Set

R/W

X: Do not care (0 or 1)

DL: It sets interface data length.

DL = 1: Datas are transferred with 8-bit lengths (DB7 - 0).DL = 0: Datas are transferred with 4-bit lengths (DB7 - 4).

(It needs two times to transfer datas) N: It sets the number of the display line. N = 0: One-line display. N = 1: Two-line display. F:

F = 1: 5 x 10 dots character font.

No. of Display Lines

Character Font

Duty Factor

5X7 dots

1 /8

5x 10 dots

1 /11

5x7 dots

1 /16

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