GDM128128A Datasheet, PDF (7/14 Pages) List of Unclassifed Manufacturers – SPECIFICATIONS OF LCD MODULE

GDM128128A
Contents
1). Setting registers
D1 D2 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
X
X
0
0
1
0
0
N2 N1 N0
CODE
00100001
00100010
00100100
HEX.
21H
22H
24H
FUNCTION
Set cursor pointer
Set offset register
Set address pointer
D1
X ADRS
DATA
Low ADRS
D2
Y ADRS
00H
High ADRS
Set cursor pointer
X ADRS and Y ADRS specify the position or the cursor. The cursor position can only be
moved by this command. Data read / write from the MPU never changes the cursor pointer.
X ADRS and Y ADRS are specified as follows.
X ADRS 00H to 4FH (lower 7 bits are valid)
Y ADRS 00H to 1FH (lower 5 bits are valid)
a) Single-scan
X ADRS 00H to 4FH
Y ADRS 00H to 0FH
b) Dual-scan
X ADRS 00H to 4FH
Y ADRS 00H to 0FH(upper screen)
Y ADRS 10H to 1FH(lower screen)
Set offset register
The offset register is used to determine the external character generator RAM area.
The T6963C has a 16-bit address bus as follows:
MSB
LSB
AD15 AD14 AD13 AD12 AD11 AD10 AD9 AD8 AD7 AD6 AD5 AD4 AD3 AD2 AD1 AD0
Offset register data
Character code
Line scan
T6963C assign external character generator, when character code set 80H to FFH in
using internal character generator. Character code 00H to 80H assign External character
generator, when External generator mode.
The senior five bits define the start address in external memory of the CGRAM area. The
next eight bits represent the character code of the character. In internal CGRAM mode,
character codes 00H to 7FH represent the predefined “internal” CGRAM characters, and
codes 80H to FFH represent the user’s own “external” characters. In external CGRAM mode,
all 256 codes from indicate one of the eight rows of eight dots that define the character’s
shape.
The relationship between display RAM address and offset register
Set address pointer
The set address pointer command is used to indicate the start address for writing to (or
reading from) external RAM.
The flowchart for set address pointer command:
V: A
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2001/12/05