HD66765 Datasheet, PDF (28/71 Pages) Hitachi Semiconductor – 396-channel Segment Driver with Internal RAM for 4096-color Displays

HD66765
Horizontal RAM Address Position (R16h)
Vertical RAM Address Position (R17h)
R/W RS
W1
DB15 DB14 DB13 DB12 DB11 DB10 DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
HEA7 HEA6 HEA5 HEA4 HEA3 HEA2 HEA1 HEA0 HSA7 HSA6 HSA5 HSA4 HSA3 HSA2 HSA1 HSA0
W 1 VEA7 VEA6 VEA5 VEA4 VEA3 VEA2 VEA1 VEA0 VSA7 VSA6 VSA5 VSA4 VSA3 VSA2 VSA1 VSA0
n ^{Figure 17 Horizontal/Vertical RAM Address Position Instruction}
tio ^{HSA7-0/HEA7-0: Specify the horizontal start/end positions of a window for access in memory. Data can}
be written to the GRAM from the address specified by HEA7-0 from the address specified by HSA7-0.
a _{Note that an address must be set before RAM is written to. Ensure 00h ≤ HSA7-0 ≤ HEA7-0 ≤ 3Fh.}
ific ^{VSA7-0/VEA7-0: Specify the vertical start/end positions of a window for access in memory. Data can be}
c ^{written to the GRAM from the address specified by VEA7-0 from the address specified by VSA7-0. Note}
e that an address must be set before RAM is written to. Ensure 00h ≤ VSA7-0 ≤ VEA7-0 ≤ AFh.
y ^Sp 0000h
HSA
ar _VSA
HEA
Prelimin ^VEA
Window address
Window address setting range
"00"h HSA7-0 HEA7-0 "83"h
"00"h VSA7-0 VEA7-0 "AF"h
GRAM address space
AF83h
Note:
1. Ensure that the window address area is within the GRAM address space.
2. In high-speed write mode, data are written to GRAM in four-words.
Thus, dummy write operations should be inserted depending on the window address
area. For details, see the High-Speed Burst RAM Write Function section.
Figure 18 Window Address Setting Range
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