HD66730 Datasheet, PDF (79/131 Pages) Hitachi Semiconductor – Dot-Matrix Liquid Crystal Display Controller/Driver Supporting Japanese Kanji, Korean Font Display

HD66730/HD66731
Table 18 Instruction Registers (cont)
Reg. Index
Code
No. (Hex) Register R/W RS DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 Description
Execution
Clock
Cycle
R8 8 RAM 0 1 RA7 RA6 RA5 RA4 RA3 RA2 RA1 RA0 Resets the address 12
address
address counter for
(RAR)
DDRAM/CGRAM/
SEGRAM. RAM is
selected by RM1/0.
R9 9
RAM
data
(RDR)
0/1 1
RD7 RD6 RD5 RD4 RD3 RD2 RD1 RD0 Writes or reads data to 12
and from
DDRAM/CGRAM/
SEGRAM. RAM is
selected by RM1/0.
RF F
Test 0 1 0 0 0 0 0
(TSR)
0 0 0 This is a test register. 12
Set 00 in this register.
Note: The execution time depends on the input or oscillation frequency.
BF = 1:
Internal processing being performed
NF1/0:
Position of display read line
LF0 to LF3: Position of display read raster-row
ID= 1:
= 0:
Address increment
Address decrement
RM1/0: RAM selection (00/01: DDRAM. (10: GGRAM, 11: SEGRAM)
BST = 1: Booster on
EXT2 = 1: Common driver extension enable
EXT1 = 1: Segment driver extension enable
DT1/0:
Duty ratio (00: 1/14, 01: 1/27, 10: 1/40, 11: 1/53)
DCL = 1: Executes display-clear instruction
CHM = 1: Executes cursor-home instruction
C = 1:
Cursor on
CM1/0: Designates cursor mode (00: 12th raster-row, 01: blinking, 10: white/black inverse)
ST = 1:
Standby mode
DC = 1: Character display on
DS = 1: Segment display on
NC1/0:
Sets the number of display characters (6 to 40 characters)
NL1/0:
Sets the number of display lines (00: 1 line, 01: 2 lines, 11: 4 lines)
SN1/0:
Designates the line to start displaying (00: first line, 01: second line, 10: third line, 11: fourth
line)
SL0 to SL3: Designates scroll starting raster-row(0000: first raster-row, 1100: 13th raster-row)
PS1/0:
Designates partial scroll (00: all columns scroll. 01: the leftmost column fixed, 10: the two
leftmost columns fixed, 11: the three leftmost columns fixed)
SE1 to SE4: Designates which line to scroll (SE = 1: enables the first line to be scrolled, etc.)
SQ0 to SQ5: Number of dots to scroll (0 to 48 dots)
RA0 to RA7: RAM address
RD0 to RD7: RAM data
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