152
5 . 5 . 4
Vertical Start Position Register (VSPR)
15
—
—
—
14
—
—
—
13
—
—
—
12
—
—
—
11
—
—
—
8
VSP
*
R/W
10
—
—
—
9
VSP
*
R/W
Bit:
Initial value:
Read/Write:
7
VSP
*
R/W
6
VSP
*
R/W
5
VSP
*
R/W
4
VSP
*
R/W
3
VSP
*
R/W
0
VSP
*
R/W
2
VSP
*
R/W
1
VSP
*
R/W
Note: * Value is retained.
The vertical start position register (VSPR) is a 16-bit readable/writable register that specifies the
vertical sync signal start position in raster-line units. In TV sync mode (bits TVM1 and TVM0 set
to 10 in DSMR), this register setting must be made so that the
VSYNC
fall setting position
specified by this register is the same as or later than the fall of
EXVSYNC
.
Bits 15 to 10 of VSPR are reserved. Only 0 should be written to these bits (a read will return an
undefined value).
VSPR bits VSP retain their values in a reset.
5 . 5 . 5
Vertical Scan Cycle Register (VCR)
15
—
—
—
14
—
—
—
13
—
—
—
12
—
—
—
11
—
—
—
8
VC
*
R/W
10
—
—
—
9
VC
*
R/W
Bit:
Initial value:
Read/Write:
7
VC
*
R/W
6
VC
*
R/W
5
VC
*
R/W
4
VC
*
R/W
3
VC
*
R/W
0
VC
*
R/W
2
VC
*
R/W
1
VC
*
R/W
Note: * Value is retained.
The vertical scan cycle register (VCR) is a 16-bit readable/writable register that specifies the
vertical scan interval, including the vertical retrace line interval, in raster-line units. In TV sync
mode (bits TVM1 and TVM0 set to 10 in DSMR), the
EXVSYNC
rise detection time limit
should be set. If a rise is not detected within the time limit, the result is indicated by the TVR flag
in SR.
Bits 15 to 10 of VCR are reserved. Only 0 should be written to these bits (a read will return an
undefined value).
VCR bits VC 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 ...