HD66717 Datasheet, PDF (9/90 Pages) Hitachi Semiconductor – (Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver)

HD66717
Pin Functions
Table 1 Pin Functional Description
Signal
IM1, IM0
RS/CS*
RW/SDA
E/SCL
DB7,
DB6,
DB5/ID5
DB4/ID4
DB3/ID3,
DB2/ID2,
DB1/ID1,
DB0/ID0,
COMS1,
COMS2
Number
Device
of Pins I/O Interfaced with Function
2
I
V_CC or GND
Selects interface mode with the MPU:
IM1, IM0 = GND, GND: I²C bus mode (receive)
IM1, IM0 = GND, V_CC: Clock-synchronized serial mode
(receive)
IM1, IM0 = V_CC, GND: 8-bit bus mode
IM1, IM0 = V_CC, V_CC: 4-bit bus mode
1
I
MPU
Selects the HD66717 during clock-synchronized serial
mode:
Low: HD66717 is selected and can be accessed
High: HD66717 is not selected and cannot be accessed
Selects the registers during 4- or 8-bit bus mode:
Low: Instruction register (write); busy flag and address
counter (read)
High: Data registers (write/read)
1
I/O, I MPU
Inputs serial (receive) data and outputs the acknowledge
bit during I²C bus mode; Inputs serial (receive) data during
clock-synchronous serial mode; selects read/write during 4-
or 8-bit bus mode:
Low: Write
High: Read
1
I
MPU
Inputs serial clock pulses during I²C bus mode and clock-
synchronized serial mode; enables data read/write during
4- or 8-bit bus mode
4
I, I/O MPU
Inputs the HD66717's identification code (ID5, ID4) during
I²C bus mode and clock-synchronized serial mode;must be
fixed to high or low (DB7 and DB6…).
Four high-order bidirectional data bus pins for tristate data
transfer during 8-bit bus mode.
Bidirectional data bus pins during 4-bit bus mode.
4
I, I/O MPU
Inputs the HD66717's identification code (ID3 to ID0)
during I²C bus mode and clock-synchronized serial mode;
must be fixed to high or low.
Four low-order bidirectional data bus pins for tristate data
transfer during 8-bit bus mode.
Must be left disconnected during 4-bit bus mode since they
are not used.
2
O LCD
Common output signals for segment icon display.
460