SH7263 Datasheet, PDF (1412/1862 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7260 Series

Section 26 LCD Controller (LCDC)
26.3.5 LCDC Start Address Register for Upper Display Data Fetch (LDSARU)
LDSARU sets the start address from which data is fetched by the LCDC for display of the LCDC
panel. When a DSTN panel is used, this register specifies the fetch start address for the upper side
of the panel.
Bit: 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
-
-
-
-
-
- SAU25 SAU24 SAU23 SAU22 SAU21 SAU20 SAU19 SAU18 SAU17 SAU16
Initial value: 0
0
0
0
1
1
0
0
0
0
0
0
0
0
0
0
R/W: R
R
R
R
R
R R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W
Bit: 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
SAU15 SAU14 SAU13 SAU12 SAU11 SAU10 SAU9 SAU8 SAU7 SAU6 SAU5 SAU4 -
-
-
-
Initial value: 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
R/W: R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R
R
R
R
Initial
Bit
Bit Name Value R/W Description
31 to 28 ⎯
All 0 R
Reserved
These bits are always read as 0. The write value should
always be 0.
27, 26 ⎯
All 1 R
Reserved
These bits are always read as 1. The write value should
always be 1.
25 to 4 SAU25 to
SAU4
All 0
R/W Start Address for Upper Display Data Fetch
The start address for data fetch of the display data must
be set within the synchronous DRAM area of area 3.
3 to 0 ⎯
All 0 R
Reserved
These bits are always read as 0. The write value should
always be 0.
Notes: 1. The minimum alignment unit of LDSARU is 512 bytes when the hardware rotation
function is not used. Write 0 to the lower nine bits. When using the hardware rotation
function, set the LDSARU value so that the upper-left address of the image is aligned
with the 512-byte boundary.
2. When the hardware rotation function is used (ROT = 1), set the upper-left address of
the image which can be calculated from the display image size in this register. The
equation below shows how to calculate the LDSARU value when the image size is 240
× 320 and LDLAOR = 256. The LDSARU value is obtained not from the panel size but
from the memory size of the image to be displayed. Note that LDLAOR must be a
binary exponential at least as large as the horizontal width of the image. Calculate
backwards using the LDSARU value (LDSARU − 256 (LDLAOR value) × (320 − 1)) to
ensure that the upper-left address of the image is aligned with the 512-byte boundary.
LDSARU = (upper-left address of image) + 256 (LDLAOR value) × 319 (line)
Rev. 2.00 Mar. 14, 2008 Page 1378 of 1824
REJ09B0290-0200