hd66789 Renesas Electronics Corporation., hd66789 Datasheet - Page 9

• Manufacturer Part Number: hd66789
• Description: 528-channel, One-chip Driver For Amorphous Tft Panels With 262,144-color Display Ram, Power Supply Circuit, And Gate Circuit
• Manufacturer: Renesas Electronics Corporation.

Signals
RS
WR*/SCL
RD*
DB0/SDI
DB1/SDO
DB2~DB17
ENABLE
HD66789
Rev.0.12, May 09 2003, page 9 of 156
Number
of Pins
1
1
1
1
1
16
1
I/O
I
I
I
I/O
I/O
I/O
I
Connected
to
MPU
MPU
MPU
MPU
MPU
MPU
MPU
Functions
Select register.
Low: Index/status, High: Control
Fix to the “IOVcc” or “GND” level while using SPI.
In 80-system bus interface mode, serves as a write strobe signal.
Data are written at “Low” level.
In Serial Peripheral Interface mode, serves as synchronizing
clock signal.
In 80-system bus interface mode, serves as read-strobe signal.
Data are read at the low level of the signal.
Fix to the “IOVcc” or “GND” level while using SPI.
18-bit parallel bi-directional data bus.
8-bit bus: DB17-DB10
9-bit bus: DB17-DB9
16-bit bus: DB17-DB10 and DB8-DB1
18-bit bus: DB17-DB0
Unused pins must be fixed to the IOVcc or GND level.
Serves as serial data input pin (SDI) in Serial Peripheral
Interface mode, where data are input on the rising edge of SCL
signal.
18-bit parallel bi-directional data bus.
8-bit bus: DB17-DB10
9-bit bus: DB17-DB9
16-bit bus: DB17-DB10 and DB8-DB1
18-bit bus: DB17-DB0
Unused pins must be fixed to the IOVcc or GND level.
Serves as serial data output pin (SDO) in Serial Peripheral
Interface mode, where data are output on the falling edge of the
SCL signal.
18-bit parallel bi-directional data bus.
8-bit bus: DB17-DB10
9-bit bus: DB17-DB9
16-bit bus: DB17-DB10 and DB8-DB1
18-bit bus: DB17-DB0
Unused pins must be fixed to the IOVcc or GND level.
Indicate whether RAM data are valid or not when RGB interface
is used.
Low: Selected (access enabled)
High: Not selected (access disabled)
Must be fixed to the IOVcc or GND level when not used.
ENABLE signal invert the polarity according to the setting of EPL
resister.
Preliminary