hd66765 Renesas Electronics Corporation., hd66765 Datasheet - Page 21

• Manufacturer Part Number: hd66765
• Description: 396-channel Segment Driver With Internal Ram For 4096-color Displays - Hitachi Semiconductor
• Manufacturer: Renesas Electronics Corporation.

LG2–0: Compare the data read from the GRAM by the microcomputer with the compare registers
(CP7–0) by a compare/logical operation and write the results to GRAM. For details, see the
Logical/Compare Operation Function.
CP11–0: Set the compare register for the compare operation with the data read from the GRAM or
written by the microcomputer.
Write data sent
from the
microcomputer
(DB11-0)
Logical/compare
operation
(LG2-0)
Write data mask *
(WM11-0)
AM = "0"
Horizontal
AM = "1"
Vertical
Direction
Settings
0000h
0000h
I/D1-0 = "00"
Horizontal: decrement
Vertical: decrement
Figure 10 Logical/Compare Operation and Swapping for the GRAM
Logical operaion (with read data and write data)
LG2-0 = "000" Replace
LG2-0 = "001" OR
LG2-0 = "010" AND
LG2-0 = "011" EOR
Note : The write data mask (WM11-0) is set by the register in the RAM Write Data Mask section.
AF83h
AF83h
Note: When a window address range has been set, the GRAM can only be witten to within that range.
DB11
0
Figure 9 Address Direction Settings
0000h
0000h
DB10
0
I/D1-0 = "01"
Horizontal: increment
Vertical: decrement
DB9
0
DB8
1
Write data mask (WM11-0)
AF83h
AF83h
DB7
21
1
GRAM
DB6
1
0000h
0000h
I/D1-0 = "10"
Horizontal: decrement
Vertical: increment
DB5
Compare operaion (with compare register)
LG2-0 = "100" Replacement of matched readdata
LG2-0 = "101" Replacement of unmatched read data
LG2-0 = "110" Replacement of matched write data
LG2-0 = "111" Replacement of ummatched write data
0
DB4
0
DB3
1
AF83h
AF83
DB2
1
0000h
0000h
DB1
1
I/D1-0 = "11"
Horizontal: increment
Vertical: increment
DB0
0
HD66765
AF83h
AF83h