Character LCD Command Sheet HTML Version

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Character LCD Command Sheet

Instruction

Code

Description

Execution

time

RS

RW

D7

D6

D5

D4

D3

D2

D1

D0

Clear display

Clears display and returns cursor to the home position (address 0).

1.52 ms

Cursor home

Returns cursor to home position. Also returns display being shifted to the original position. DDRAM content remains unchanged.

1.52 ms

Entry mode set

I/D

Sets cursor move direction (I/D); specifies to shift the display (S). These operations are performed during data read/write.

37 I1/4s

Display on/off control

Sets on/off of all display (D), cursor on/off (C), and blink of cursor position character (B).

37 I1/4s

Cursor/display shift

R/L

Sets cursor-move or display-shift (S/C), shift direction (R/L). DDRAM content remains unchanged.

37 I1/4s

Function set

A 0

s/c

A F

A *

A Sets interface data length (DL), number of display line (N), and character font (F)

A 37 I1/4s

Set CGRAMA address

A 0

A 1

A A A A A A CGRAM address

A Sets the CGRAM address. CGRAM data are sent and received after this setting.

A 37 I1/4s

Set DDRAMA address

A 1

A A A A A A A DDRAM address

A Sets the DDRAM address. DDRAM data are sent and received after this setting.

A 37 I1/4s

Read busy flagA & add resscounter

A A A A A A A CGRAM/DDRAM address

A Reads busy flag (BF) indicating internal operation being performed and reads CGRAM or DDRAM address counter contents (depending on previous instruction).

A 0 I1/4s

Write CGRAM orA DDRAM

A A A A A A A A Write Data

A Write data to CGRAM or DDRAM.

37 I1/4s

Read from CGRAM orDDRAM

A 1

A A A A A A A A Read Data

A Read data from CGRAM or DDRAM.

A 37 I1/4s

Instruction bit names:</p>

I/DA - 0 = decrement cursor position, 1 = increment cursor position;
SA - 0 = no display shift, 1 = display shift;
DA - 0 = display off, 1 = display on;
CA - 0 = cursor off, 1 = cursor on;
BA - 0 = cursor blink off, 1 = cursor blink onA ;
S/CA - 0 = move cursor, 1 = shift display;
R/LA - 0 = shift left, 1 = shift right;
DLA - 0 = 4-bit interface, 1 = 8-bit interface;
NA - 0 = 1/8 or 1/11 duty (1 line), 1 = 1/16 duty (2 lines);
FA - 0 = 5A--8 dots, 1 = 5A--10 dots;
BFA - 0 = can accept instruction, 1 = internal operation in progress.

Character LCD Command Sheet HTML Version