HD66750 Datasheet, PDF (14/96 Pages) Hitachi Semiconductor – 128 x 128-dot Graphics LCD Controller/Driver with Four-grayscale Functions

HD66750/1
Pin Functions
Table 2 Pin Functional Description
Signals
IM1, IM0
Number of
Pins
I/O
2
I
CS*
1
I
RS
1
I
E/WR*
1
I
RW/RD*
1
I
DB0ÐDB15 16
I/O
COM1/128Ð 128
O
COM128/1
SEG1/128Ð 128
O
SEG128/1
Connected to Functions
GND or V_CC
Selects the MPU interface mode:
IM1
GND
GND
Vcc
Vcc
IM0
GND
Vcc
GND
Vcc
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
MPU
Selects the HD66750/1:
Low: HD66750/1 is selected and can be accessed
High: HD66750/1 is not selected and cannot be
accessed
Must be fixed at GND level when not in use.
MPU
Selects the register.
Low: Index/status High: Control
MPU
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.
MPU
For a 68-system bus interface, serves as a signal to
select data read/write operation.
Low: Write High: Read
For an 80-system bus interface, serves as a read
strobe signal and reads data at the low level.
MPU
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.
LCD
Output signals for common drive: All the unused pins
output unselected waveforms. In the display-off
period (D = 0), sleep mode (SLP = 1), or standby
mode (STB = 1), all pins output GND level.
The CMS bit can change the shift direction of the
common signal. For example, if CMS = 0, COM1/128
is COM1, and COM128/1 is COM128. If CMS = 1,
COM1/128 is COM128, and COM128/1 is COM1.
Note that the start position of the common output is
shifted by CN1ÐCN0 bits.
LCD
Output signals for segment drive. In the display-off
period (D = 0), sleep mode (SLP = 1), or standby
mode (STB = 1), all pins output GND level.
The SGS bit can change the shift direction of the
segment signal. For example, if SGS = 0, SEG1/128
is SEG1. If SGS = 1, SEG1/128 is SEG128.
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