146
5 . 4 . 2
Display Start Address Registers 0 and 1 (DSAR0, DSAR1)
15
—
—
—
14
—
—
—
13
—
—
—
12
—
—
—
11
—
—
—
8
—
—
—
10
—
—
—
9
—
—
—
Bit:
DSAR1
Initial value:
Read/Write:
7
—
—
—
6
*
R/W
5
*
R/W
4
*
R/W
3
DSA1 (address A22–A16 setting)
*
R/W
0
*
R/W
2
*
R/W
1
*
R/W
15
—
—
—
14
—
—
—
13
—
—
—
12
—
—
—
11
—
—
—
8
—
—
—
10
—
—
—
9
—
—
—
Bit:
DSAR0
Initial value:
Read/Write:
7
—
—
—
6
*
R/W
5
*
R/W
4
*
R/W
3
DSA0 (address A22–A16 setting)
*
R/W
0
*
R/W
2
*
R/W
1
*
R/W
Note: * Value is retained.
Display address registers 0 and 1 (DSAR0, DSAR1) are 16-bit readable/writable registers that
specify the memory areas to be used as UGM frame buffers.
Only the upper 6 bits (A22 to A16) of the start physical address of frame buffer 0 (F0) are set in
the DSA0 field in DSAR0, and only the upper 6 bits (A22 to A16) of the start physical address of
frame buffer 1 (F1) are set in the DSA1 field in DSAR1.
The display start address register whose contents are actually valid as the display start address is the
register indicated by DBF in SR. The display start address register whose contents are not valid as
the display start address indicates the rendering coordinate origin. When these registers are modified,
the new set value becomes valid when an internal update is performed in the case of the display
start address register whose contents are valid as the display start address, and when an external
update (rewrite) is performed in the case of the display start address register that indicates the
rendering coordinate origin.
Bits 15 to 7 of DSAR0 and DSAR1 are reserved. Only 0 should be written to these bits (a read
will return an undefined value).
The DSA0 field in DSAR0 and the DSAR1 field in DSAR1 retain their values in a reset.
Содержание HD64411 Q2
Страница 17: ...10 ...
Страница 31: ...24 ...
Страница 108: ...101 Example 0 0 Work coordinates Rendering coordinates XC YC ...
Страница 110: ...103 Example Old XC YC Old XC XC old YC YC 0 0 Work coordinates Rendering coordinates XC YC ...
Страница 112: ...105 Example 0 0 Work coordinates Rendering coordinates XO1 YO1 XO1 DX2 YO1 DY2 XO1 DX1 YO1 DY1 LINE ...
Страница 116: ...109 Example 0 0 Work coordinates Rendering coordinates XMIN YMIN XMAX YMAX ...
Страница 118: ...111 Example 0 0 Work coordinates Rendering coordinates XMAX YMAX ...
Страница 120: ...113 Example 0 0 Work coordinates XMIN YMIN XMAX YMAX ...
Страница 129: ...122 ...
Страница 167: ...160 ...
Страница 179: ...172 ...
Страница 213: ...206 Figure 7 20 TV Sync Mode Display Timing When DOT 0 or DOT 1 and EXHSYNC cycle is even multiple of CLK1 cycle ...