HD66766R Datasheet, PDF (28/97 Pages) Hitachi Semiconductor – 132 x 176-dot Graphics LCD Controller/Driver for 65K Colors

HD66766R
Rev. 1.0-1 / September 2002
LG2-0: Compare the data read from the GRAM by the microcomputer with the compare resisters (CP15-
0) by a compare/logical operation and writes the results to GRAM. For details, see the Logical/Compare
Operation Function.
CP15-0: Set the compare resister for the compare operation with the data read from the GRAM or written
by the microcomputer.
Write data sent
from the
microcomputer
(DB15-0)
DB15 DB14 DB13 DB12 DB11 DB10 DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 0 00 0 0 01 11 0 0 11 1 0
Logical/compare
operation
(LG2 - 0)
Logical operation (with compare resister)
LG2-0 = "110”: Replacement of matched write data
LG2-0 = "111”: Replacement of unmatched writes data
Write data mask *
(WM15 - 0)
Write data mask (WM15-0)
GRAM
Note: The write data mask ( WM15-0 ) is set by the resister in the (20) RAM Write Data Mask section.
Figure 13 Logical/Compare Operation for the GRAM
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