hd66765 Renesas Electronics Corporation., hd66765 Datasheet - Page 6

• Manufacturer Part Number: hd66765
• Description: 396-channel Segment Driver With Internal Ram For 4096-color Displays - Hitachi Semiconductor
• Manufacturer: Renesas Electronics Corporation.

HD66765
Pin Functions
Table 1
Signals
IM2-1,
IM0/ID
CS*
RS
E/WR*/SCL
RW/RD*
DB0/SDI
Pin Functional Description
Number of
Pins
3
1
1
1
1
1
I/O
I
I
I
I
I
I/O
Connected to
GND or V
MPU
MPU
MPU
MPU
MPU
CC
Functions
Selects the MPU interface mode:
When a serial interface is selected, the IM0 pin is
used as the ID setting for a device code.
Selects the HD66765:
Low: HD66765 is selected and can be accessed
High: HD66765 is not selected and cannot be
accessed
Must be fixed at GND level when not in use.
Selects the register.
Low: Index/status
For a 68-system bus interface, serves as an enable
signal to activate data read/write operation.
For an 80-system bus interface, serves as a write
strobe signal and writes data at the low level.
For a synchronous clock interface, serves as the
synchronous clock signal.
For a 68-system bus interface, serves as a signal to
select data read/write operation.
Low: Write
For an 80-system bus interface, serves as a read
strobe signal and reads data at the low level.
Serves as a 16-bit bidirectional data bus.
For an 8-bit bus interface, data transfer uses DB15-
DB8; fix unused DB7-DB0 to the Vcc or GND level.
For a clock-synchronous serial interface, serves as
the serial data input pin (SDI). The input level is read
on the rising edge of the SCL signal.
6
GND
GND
GND
GND
IM2
Vcc GND
GND
GND
IM1
Vcc
Vcc
IM0/ID
GND
GND
Vcc
Vcc
High: Read
ID
MPU interface mode
68-system 16-bit bus interface
68-system 8-bit bus interface
80-system 16-bit bus interface
80-system 8-bit bus interface
Serial peripheral interface (SPI)
High: Control