hd66789 Renesas Electronics Corporation., hd66789 Datasheet - Page 8

• 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
IM3~1, IM0/ID
CS*
VLD
HD66789
Pin Functions
Rev.0.12, May 09 2003, page 8 of 156
Number
of Pins
4
1
1
I/O
I
I
I
Connected
to
GND or
IOVcc
MPU
MPU
Functions
Pins to select interfacing mode with MPU.
When Serial Peripheral Interface is selected, IM0 pin is used for
the device code ID setting.
Select the HD66789.
Low: the HD6678 is selected and accessible
High: the HD66789 is not selected and not accessible
Must be fixed to the GND level while not used.
Indicate whether the data is valid or not during RAM write.
Low: Valid (Write data to RAM)
High: Invalid (Not write data to RAM)
RAM address will be updated irrespective of VLD.
Must be fixed to the GND level while not used.
This signal is available when external display interface is used.
IM3
GND
GND
GND
GND
GND
GND
IOVcc
IOVcc
IOVcc
IOVcc
IOVcc
CS
0
0
1
VLD
0
1
*
IM2
GND
GND
GND
GND
IOVcc
IOVcc
GND
GND
GND
GND
IOVcc
RAM Write
Valid
Invalid
Invalid
IM1
GND
GND
IOVcc
IOVcc
GND
IOVcc
GND
GND
IOVcc
IOVcc
*
IM0/ID
GND
IOVcc
GND
IOVcc
ID
*
GND
IOVcc
GND
IOVcc
*
MPU-Interface
Mode
Setting disabled
Setting disabled
80-system 16-bit
interface
80-system 8-bit
interface
Serial Peripheral
Interface (SPI)
Setting disabled
Setting disabled
Setting disabled
80-system 18-bit
interface
80-system 9-bit
interface
Setting disabled
RAM Address
Updated
Updated
Hold
Preliminary
DB Pin
_
_
DB17~10,
DB8~1
DB17 ~10
DB1~ 0
DB17~0
DB17~9