HD66710 Datasheet, PDF (10/73 Pages) Hitachi Semiconductor – (Dot Matrix Liquid Crystal Display Controller/Driver)

HD66710
Pin Functions
Table 1 Pin Functional Description
Signal
I/O
RS
I
R/:
I
E
I
DB4 to DB7
I/O
DB0 to DB3
I/O
COM1 to COM33 O
SEG1 to SEG35 O
SEG36
O
SEG37/CL1
O
SEG38/CL2
O
SEG39/D
O
SEG40/M
O
EXT
I
V1 to V5
—
Device
Interfaced with
MPU
MPU
MPU
MPU
MPU
LCD
LCD
LCD
LCD/
Extension driver
LCD/
Extension driver
LCD/
Extension driver
LCD/
Extension driver
—
Power supply
Function
Selects registers
0: Instruction register (for write)
Busy flag: address counter (for read)
1: Data register (for write and read)
Selects read or write
0: Write
1: Read
Starts data read/write
Four high order bidirectional tristate data bus pins. Used for
data transfer between the MPU and the HD66710. DB7 can
be used as a busy flag.
Four low order bidirectional tristate data bus pins. Used for
data transfer between the MPU and the HD66710. These
pins are not used during 4-bit operation.
Common signals; those are not used become non-selected
waveforms. At 1/17 duty rate, COM1 to COM16 are used for
character display, COM17 for icon display, and COM18 to
COM33 become non-selected waveforms. At 1/33 duty rate,
COM1 to COM32 are used for character display, and
COM33 for icon display.
Segment signals
Segment signal. When EXT = high, the same data as that of
the first dot of the extension driver is output.
Segment signal when EXT = low. When EXT = high, outputs
the extension driver latch pulse.
Segment signal when EXT = low. When EXT = high, outputs
the extension driver shift clock.
Segment signal at EXT = low. At EXT = high, the extension
driver data. Data on and after the 36th dot is output.
Segment signal when EXT = low. When EXT = high, outputs
the extension driver AC signal.
Extension driver enable signal. When EXT = high, SEG37 to
SEG40 become extension driver interface signals. At this
time, make sure that V5 level is lower than GND level (0 V).
V5 (low) ≤ GND (high).
Power supply for LCD drive
V_CC – V5 = 13V (max)
300