HD66740 Datasheet, PDF (9/95 Pages) Hitachi Semiconductor – 112 x 80-dot Graphics LCD Controller/Driver

HD66740
Pin Functions
Table 2
Signals
IM2, IM1
Pin Functional Description
Number of
Pins
I/O Connected to
2
I
GND or V_CC
Functions
Selects the MPU interface mode:
IM2 IM1 MPU interface mode
"GND" "GND" Clock synchronized serial interface
"GND" "Vcc" 68-system parallel interface
"Vcc" "GND" I2C bus interface
"Vcc" "Vcc" 80-system parallel interface
IM0/ID
1
CS*
1
RS
1
E/WR*/SCL 1
RW/RD*/ 1
SDA
I
GND or V_CC
I MPU
I MPU
I MPU
I or MPU
I/O
Selects the transfer bus length for a parallel bus
interface.
GND: 8-bit bus, Vcc: 4-bit bus
Inputs the ID of the device ID code for a serial bus and
I2C bus interface.
Selects the HD66740:
Low: HD66740 is selected and can be accessed
High: HD66740 is not selected and cannot be
accessed
Must be fixed at GND level when not in use.
Selects the register for a parallel bus interface.
Low: Instruction High: RAM access
Must be fixed at GND level when not in use.
For an 80-system parallel bus interface, serves as a
write strobe signal and writes data at the low level.
For a 68-system parallel bus interface, serves as an
enable signal to activate data read/write operation.
Inputs the serial transfer clock for a serial interface.
Fetches data at the rising edge of a clock.
For an 80-system parallel bus interface, serves as a
write strobe signal and reads data at the low level.
For a 68-system parallel bus interface, serves as a
signal to select data read/write operation.
Low: Write
High: Read
Serves as the bidirectional serial transfer data for a
serial interface. Sends/Receives data.
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