HD66710 Datasheet, PDF (42/73 Pages) Hitachi Semiconductor – (Dot Matrix Liquid Crystal Display Controller/Driver)

HD66710
2) Interface to 4-Bit MPUs
HD66710 can interface to 4-bit MCU through I/O port. 4-bit data for high and low order must be
transferred twice continuously. The DL bit in function set selects the interface data length.
RS
R/W
E
Internal
signal
DB7
IR7 IR3
Instruction
write
Internal operation
Busy AC3
Busy flag check
Not
Busy ^AC3
Busy flag check
D7 D3
Instruction
write
Figure 18 Example of 4-Bit Data Transfer Timing Sequence
HMCS4019R
D15
D14
D13
4
R10–R13
HD66710
16
RS
COM1–
R/W
COM16
E
SEG1–
40
DB4 –DB7 SEG40
Connected to
the LCD
Figure 19 Interface to HMCS4019R
332