SH7764 Datasheet, PDF (1262/1752 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC Engine Family SH-4A Series

Section 23 G2D
Relationship between Source/Destination Pixel Format (SPF/DPF) and SAU and AVALUE
Bits
SPF DPF SAU
0
0
*
0
1
*
1
0
*
1
1
0
0
1
Note: * Don't care
AVALUE Description
*
Source = RGB (565) and destination = RGB (565).
The SAU and AVALUE bit settings are invalid.
*
Setting prohibited.
*
Setting prohibited.
0
Source = ARGB (1555) and destination = ARGB (1555).
The destination A value is drawn as 0.
1
Source = ARGB (1555) and destination = ARGB (1555).
The destination A value is drawn as 1.
*
Source = ARGB (1555) and destination = ARGB (1555).
The destination A value is drawn referencing the source A
value. The AVALUE bit setting is invalid.
When SAU = 1, the A value of the command parameter Color0 or Color1 is referenced in a binary
source reference command and the A value of the command parameter Color is referenced in a
monochrome specification command.
In the LINED command, the A value of the ground (destination) is written back, regardless of the
settings of the SAU and AVALUE bits.
Bit 1—Line Pre-Clipping Enable (LPCE): This bit setting is valid in a LINE, RLINE, LINEW,
or RLINEW command. When this bit is set to 1, pre-clipping is performed in line-segment units in
the 2-dimensional clipping areas (system clipping, user clipping, and relative user clipping areas).
If a line segment in the middle is pre-clipped, the pattern continuity is broken (the pattern starts
from the final point of the line segment previously drawn).
Bit 1: LPCE
0
1
Description
Pre-clipping is not performed (Initial value)
Pre-clipping is performed in line-segment units in the 2-dimensional clipping areas
Rev. 1.00 Nov. 22, 2007 Page 1206 of 1692
REJ09B0360-0100