SBN0064G Datasheet, PDF (20/37 Pages) List of Unclassifed Manufacturers – Dot-matrix STN LCD 64-SEGMENT Driver with 64-row x 64-column Display Data Memory

Avant Electronics
SBN0064G
Dot-matrix STN LCD 64-SEGMENT Driver with 64-row x 64-column Display Data Memory
8 READ OR WRITE OPERATION TO THE DISPLAY DATA MEMORY
READ or WRITE operation to the Display Data Memory is shown in Table 17. When performing a READ or WRITE
operation, the host microcontroller should give the control bus C/D, E, and R/W proper value and timing.
Table 17 READ/WRITE operation
Operation
DATA
Description
Write Display Data
D7 D6 D5 D4 D3 D2 D1 D0
Data to be written into the Display Data
Memory.
Write a byte of data to the Display Data Memory.
The data to be written is put on the data bus by the
host microcontroller.
Read a byte of data from the Display Data Memory.
Read Display Data
Data read from the Display Data
Memory output latch.
The data read from the internal 8-bit output latch
(refer to Fig. 12) appears on the data bus.
A dummy read is needed to get correct value.
8.1 Write Display Data
The Write Display Data operation writes a byte (8 bits) of data to the Display Data Memory. Data is put on the data bus
by the host microcontroller. The location which accepts this byte of data is pointed to by the Page Address Register and
the Column Address Register. At the end of the operation, the content of the Column Address Register is automatically
incremented by 1.
For page address and column address of the Display Data Memory, please refer to Fig. 11.
Table 18 gives the control bus setting for this command.
Table 18 The setting of the control bus for Write Display Data operation
C/D
R/W
1
0
2005 May 20
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data sheet (v3)