HT0313A Tomato LSI, Inc., HT0313A Datasheet - Page 35

• Manufacturer Part Number: HT0313A
• Description: 65COM/132SEG DRIVER & CONTROLLER FOR STN LCD
• Manufacturer: Tomato LSI, Inc.

HT0313A
TOMATO LSI Inc.
7-1. Read display data
The 8-bit data from DDRAM specified by the column address and the page address can be read by this
instruction. As the column address is increased by 1 automatically after each this instruction, the MPU can
continuously read the data from the addressed page. A dummy read is required after loading an address
into the column address register. Display data cannot be read through the serial interface.
7-2. Write display data
8-bit data of display data from the MPU can be written to the RAM location specified by the column address
and page address. The column address is increased by 1 automatically so that the microprocessor can
continuously write data to the addressed page.
Figure 7-1. Sequence for writing display data
RS
RS
1
1
RW
RW
1
0
Data write continue?
Column = Column + 1
Set column address
Set page address
65COM / 132SEG DRIVER & CONTROLLER FOR STN LCD
Optional status
Data write
DB7
DB7
NO
35
DB6
DB6
YES
DB5
DB5
Figure 7-2. Sequence for reading display data
DB4
DB4
Read data
Write data
DB3
DB3
Data read continue?
Column = Column + 1
Column = Column + 1
Set column address
Dummy data read
Set page address
Optional status
Data read
DB2
DB2
NO
Ver 0.0
DB1
DB1
YES
DB0
DB0