GDM12864A Datasheet, PDF (22/22 Pages) List of Unclassifed Manufacturers – Liquid Crystal Display Module

64CH Segment Driver For Dot Matrix LCD 20
3. Set Page (X Address)
X address (AC0~AC2) of the display data RAM is set in the X address register.
Writing or reading to or from MPU is executed in this specified page until the next page is set.
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00
1
0
1
1
1
AC2 AC1 AC0
4. Display Start Line (Z Address)
Z address (AC0~AC5) of the display data RAM is set in the display start line register and displayed at
the top of the screen.
When the display duty cycle is 1/64 or others (1/32~1/64), the data of total line number of LCD
screen, from the line specified by display start line instruction, is displayed.
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00
1
1 AC5 AC4 AC3 AC2 AC1 AC0
5. Status Read
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DB4 DB3 DB2 DB1 DB0
1
0
BUS
Y
0 ON/OFF RESET
0
0
0
0
?? BUSY
When BUSY is 1, the Chip is executing internal operation and no instructions are accepted.
When BUSY is 0, the Chip is ready to accept any instructions.
?? ON/OFF
When ON/OFF is 1, the display is on.
When ON/OFF is 0, the display is off.
?? RESET
When RESET is 1, the system is being initialized.
In this condition, no instructions except status read can be accepted.
When RESET is 0, initializing has finished and the system is in the usual operation condition.
6. Write Display Data
Writes data (D0~D7) into the display data RAM.
After writing instruction, Y address is increased by 1 automatically.
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0 1 D7 D6 D5 D4 D3 D2 D1 D0
7. Read Display Data
Reads data (D0~D7) from the display data RAM.
After reading instruction, Y address is increased by 1 automatically.
RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
1 1 D7 D6 D5 D4 D3 D2 D1 D0
© 1998 Intech LCD Group Ltd.