hd66717 Renesas Electronics Corporation., hd66717 Datasheet - Page 47
hd66717
Manufacturer Part Number
hd66717
Description
Low-power Dot-matrix Liquid Crystal Display Controller/driver -
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.HD66717.pdf
(90 pages)
- Current page: 47 of 90
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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
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.
Internal signal
R/W
DB7
RS
E
Figure 24 8-Bit Parallel Data Transfer Timing Sequence
Instruction write
Data
H8/325
Figure 25 8-Bit MPU Interface
A0 - A7
Busy flag check Busy flag check Busy flag check
C0
C1
C2
Busy
I/O port interface
Internal operation
8
Busy
E
RS
R/W
DB0 - DB7
HD66717
Busy
Not
Instruction write
Data
CC
and GND levels,
HD66717
499
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