HD66766R Datasheet, PDF (41/97 Pages) Hitachi Semiconductor – 132 x 176-dot Graphics LCD Controller/Driver for 65K Colors

HD66766R
Rev. 1.0-1 / September 2002
Parallel Data Transfer
16-bit Bus Interface
Setting the IM2/1/0 (interface mode) to the “GND”/“GND”/“GND” level allows 68-system E-clock-
synchronized 16-bit parallel data transfer. Setting the IM2/1/0 to the “GND”/”Vcc”/”GND” level allows
80-system 16-bit parallel data transfer. When the number of buses or the mounting area is limited, use an
8-bit bus interface.
H8/2245
CSn*
A1
HWR*
(RD*)
D15 - D0
16
CS*
RS
WR* HD66766
(RD*)
DB15 - DB0
Figure 26 Interface to 16-bit Microcomputer
8-bit Bus Interface
Setting the IM2/1/0 (interface mode) to the “GND”/”GND” /”Vcc” level allows 68-system E-clock-
synchronized 8-bit parallel data transfer using DB15–DB8 pins. Setting the IM2/1/0 to the
“GND”/”Vcc”/”Vcc” level allows 80-system 8-bit parallel data transfer. The 16-bit instructions and
RAM data are divided into eight upper/lower bits and the transfer starts from the upper eight bits. Fix
unused pins DB7–DB0 to the ”Vcc” or “GND” level. Note that the upper bytes must also be written
when the index register is written to.
CSn*
A1
H8/2245 HWR*
(RD*)
D15 - D8
8
8
GND
CS*
RS
WR* HD66766
(RD*)
DB15 - DB8
DB7 - 0
Figure 27 Interface to 8-bit Microcomputer
41