hd66765 Renesas Electronics Corporation., hd66765 Datasheet - Page 50
hd66765
Manufacturer Part Number
hd66765
Description
396-channel Segment Driver With Internal Ram For 4096-color Displays - Hitachi Semiconductor
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.HD66765.pdf
(71 pages)
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HD66765
Graphics Operation Processing
1. Write mode 1: AM = 0, LG2–0 = 000
Operation Examples:
This mode is used when the data is horizontally written at high speed. It can also be used to initialize
the graphics RAM (GRAM) or to draw borders. The write-data mask function (WM11–0) is also
enabled in these operations. After writing, the address counter (AC) automatically increments by 1
(I/D = 1) or decrements by 1 (I/D = 0), and automatically jumps to the counter edge one-raster-row
below after it has reached the left or right edge of the GRAM.
1) I/D = "1", AM = "0", LG2-0 = "000"
2) WM11—0 = "0FF"H
3) AC = "0000"H
Write-data mask:
Write data (1):
Write data (2):
1 0 0 1 * * * * * * * *
Write data (1)
"0000"H
DB11
DB11
0
1
1 1 0 0 0 0 1 1 0 0 0 0
0 0 0 1 1 1 1 1 1 1 1
0 0 1 1 0 0 1 0 1 0 0
Figure 36 Writing Operation of Write Mode 1
1 1 0 0 * * * * * * * *
Write data (2)
GRAM
"0001"H
DB0
DB0
50
*Write mask for plain <G> and <B>.
Note: The bits in the GRAM
indicated by ’*’ are not changed.
"0002"H
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