hd66789 Renesas Electronics Corporation., hd66789 Datasheet - Page 102

• 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.

HD66789
Comparison between Normal and High-Speed RAM Write Operations
Logical operation function
Compare operation function
BGR function
Write mask function
RAM address set
RAM read
RAM write
Window address
External display interface
AM Setting
Rev.0.12, May 09 2003, page 102 of 156
Normal RAM Write
(HWM=0)
Available
Available
Available
Available
Specified by one
word
Read by one word
Write by one word
Set by one word
Available
AM = 1/0
High-Speed RAM Write (HWM=1)
Not available
Not available
Available
Available
ID0 bit=0: Set the lower two bits to 11
ID0 bit=1: Set the lower two bits to 00
Not available
Dummy write operations may be required depending
on the specified window-address range
Horizontal range(HSA/HSE): more than four words
Number of horizontal writing : 4N (N>=2)
Available
AM = 0
Preliminary