DOCUMENT NO. REV.NO PAGE
STANDARD
NAME
00 15/20
Data write to CG
or DDRAM
1
0
Data writing
Writes data into CG-RAM or
DD-RAM
Data Read from
CG or DDRAM
1 1
Data reading
Read data from CG-RAM or
DD-RAM
!NOTE
I/D=1: Increment
I/D=0: Decrement
S=1: Display shift enabled
S=0: Cursor shift enabled
S/C=1: Display shift
S/C=0: Cursor move
R/L=1: Shift to the right
R/L=0: Shift to the left
IF=1: 8bits
IF=0: 4bits
N=1: 2 Lines display
N=0:1 Lines display
BR1, BR0= 00: 100%
01: 75%
10: 50%
11: 25%
BF=1:Busy (Internally operating).
BF=0:Not busy (Instruction acceptable)
. :"Fqp)v"ectg
[Abbreviation]
DD-RAM: Display Data RAM
CG-RAM: Character Generater
RAM
ACG: CG-RAM Address
ADD: DD-RAM Address
ACC: Address Counter
6.2 Instruction Description
6.2.1 Display Clear
DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0000 00 0 1
RS=0, R/W=0
This instructions
(1) Fills all locations in the display data RAM (DD-RAM) with 20H (Blank-character).
(2) Clears the contents of the address counter (ACC) to 00H.
(3) Sets the display for zero character shift (returns original position).
(4) Sets the address counter(ACC) to point to the DD-RAM.
(5) If the cursor is displayed, moves the cursor to the left most character in the top line (upper line).
(6)Sets the address counter (ACC) to increment on the each access of DD-RAM or CG-RAM.
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