SH7764 Datasheet, PDF (1146/1752 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC Engine Family SH-4A Series

Section 23 G2D
(9) Source Address Specification (SS)
The SS bit is used to select whether the source is to be referenced at a 2-dimensional source area
address or at the address indicated by the Base Address parameter in the display list. The source
address specification can be used with the POLYGON4A, POLYGON4B, BITBLTA, and
BITBLTB commands. The SS bit should be clear to 0 in the other commands. If the offset values
are set, the source is referenced from (TXOFS, TYOFS).
SS = 1
2-dimensional source
area start address
(SSAR)
Source stride (SSTRR)
(TXS, TYS)
(TXOFS, TYOFS)
Height
SS = 0
Base Address
(TXOFS, TYOFS)
Height
Width
Height: POLYGON4 type command (TDY) or
BITBLT type command (TH + BH + 1)
Width: POLYGON4 type command (TDX) or
BITBLT type command (LW + RW + 1)
The source start address is set by the 2-dimensional source area
start address register (SSAR).
The source stride is set by the source stride register (SSTRR).
Width = source stride
Height: POLYGON4 type command (TDY) or
BITBLT type command (TH + BH + 1)
Width: POLYGON4 type command (TDX) or
BITBLT type command (LW + RW + 1)
The source start address is the address indicated by the Base
Address parameter in the display list.
The source stride is the Width parameter in the display list.
Figure 23.11 Example of Source Address Specification
Note: When SS = 1, settings must be made within the ranges of 0 ≤ TXS ≤ SSTRR – Width
(TDX, LW + RW + 1), 0 ≤ TYS ≤ 4096 – Height (TDY, TH + BH + 1).
Rev. 1.00 Nov. 22, 2007 Page 1090 of 1692
REJ09B0360-0100