HD66717 Datasheet, PDF (47/90 Pages) Hitachi Semiconductor – (Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver)

HD66717
Transferring Parallel Data
Interface with an 8-Bit MPU
Eight-bit data can be transferred in parallel by setting the IM1 and IM0 pins to the V_CC and GND levels,
respectively (Figure 24). The HD66717 can interface directly with an 8-bit bus synchronized with the E
clock, or with an 8-bit MCU through an I/O port (Figure 25). When the number of I/O lines or chip
packaging size is limited, a 4-bit bus interface or even serial data transfer should be used.
RS
R/W
E
Internal signal
DB7
Internal operation
Data
Busy
Busy
Not
Busy
Data
Instruction write Busy flag check Busy flag check Busy flag check Instruction write
Figure 24 8-Bit Parallel Data Transfer Timing Sequence
C0
C1
H8/325 C2
A0 - A7
I/O port interface
8
E
RS
R/W HD66717
DB0 - DB7
Figure 25 8-Bit MPU Interface
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