hd66717 Renesas Electronics Corporation., hd66717 Datasheet - Page 9

• Manufacturer Part Number: hd66717
• Description: Low-power Dot-matrix Liquid Crystal Display Controller/driver -
• Manufacturer: Renesas Electronics Corporation.

HD66717
Pin Functions
Table 1
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
460
Number
of Pins
2
4
4
2
1
1
1
Pin Functional Description
I/O
I
I
I/O, I MPU
I
I, I/O MPU
I, I/O MPU
O
Device
Interfaced with Function
V
MPU
MPU
LCD
CC
or GND
Selects interface mode with the MPU:
IM1, IM0 = GND, GND: I
IM1, IM0 = GND, V
(receive)
IM1, IM0 = V
IM1, IM0 = V
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)
bit during I
clock-synchronous serial mode; selects read/write during 4-
or 8-bit bus mode:
Low: Write
High: Read
synchronized serial mode; enables data read/write during
4- or 8-bit bus mode
Inputs the HD66717's identification code (ID5, ID4) during
I
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.
Inputs the HD66717's identification code (ID3 to ID0)
during I
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.
Common output signals for segment icon display.
Selects the HD66717 during clock-synchronized serial
Inputs serial (receive) data and outputs the acknowledge
Inputs serial clock pulses during I
2
C bus mode and clock-synchronized serial mode;must be
2
C bus mode and clock-synchronized serial mode;
2
C bus mode; Inputs serial (receive) data during
CC
CC
, GND: 8-bit bus mode
, V
CC
: 4-bit bus mode
CC
: Clock-synchronized serial mode
2
C bus mode (receive)
2
C bus mode and clock-