SC2200 NSC [National Semiconductor], SC2200 Datasheet - Page 346

• Manufacturer Part Number: SC2200
• Description: Thin Client On a Chip
• Manufacturer: NSC [National Semiconductor]

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Video Processor Module
Offset 50h-53h
Offset 54h-57h
31:29
28:24
31:24
23:0
23:0
2:0
Bit
12
11
10
9
8
7
6
5
4
3
Table 6-7. F4BAR0+Memory Offset: Video Processor Configuration Registers (Continued)
Description
VID_LIN_INV (Video Line Invert). When this bit is set, it allows the video window to be positioned at odd offsets with
respect to the first line. The values below are recommended if VID_Y_START (F4BAR0+Memory Offset 0Ch[10:0]) is an
odd (set to 1) or even (set to 0) number of lines from the start of the active display.
0: Even.
1: Odd.
Reserved: Set to 0.
CSC_FOR_VIDEO (Color Space Converter for Video). Determines whether or not the video stream from the video mod-
ule is passed through the CSC.
0: Disable. The video stream is sent "as is" to the video Mixer/Blender.
1: Enable. The video stream is passed through the CSC (for YUV to RGB conversion).
Note:
VIDEO_BLEND_MODE (Video Blending Mode). Allows selection of the type of video (i.e., interlaced or progressive) used
for blending.
0: Progressive video used for blending.
1: Interlaced video used for blending.
Note:
GFX_INS_VIDEO (Graphics Inside Video). This bit works in conjunction with bit COLOR_CHROMA_SEL (F4BAR0+Mem-
ory Offset 4Ch[20]). COLOR_CHROMA_SEL selects whether the graphics is used for color keying or the video data stream
is used for chroma keying. If COLOR_CHROMA_SEL = 0, graphics data is compared to the color key. If
COLOR_CHROMA_SEL = 1, video data is compared to the chroma key.
0: Outside the alpha windows, graphics or video is displayed depending on the result of the color key comparison.
1: Outside the alpha windows, only video is displayed (if COLOR_CHROMA_SEL = 0) or only graphics is displayed (if
VID_WIN_PUSH_EN (Video Window Push Enable). Video window repositioning at an offset of 1 line below the pro-
grammed value. Facilitates line rate matching in both fields.
0: Disable. (Default)
1: Enable.
TOP_LINE_IN_ODD (Top Line in Odd Field). Allows selection of what field the top line is in.
0: Top line is in even field. (Default)
1: Top line is in odd field.
Reserved.
INSERT_EN (Insert Enable). When this bit is set, the odd frame is shifted with respect to the even frame.
0: No shifting occurs.
1: The odd frame is shifted according to the offset specified in bits [2:0].
Reserved.
OFFSET (Vertical Scaler Offset). For an interlaced video stream, program a value of 100 (i.e., shift one line).
Reserved.
COLOR_REG_OFFSET (Cursor Color Register Offset). This field indicates a bit in the incoming graphics stream. It is
used to indicate which of the two possible cursor color registers should be used for color key matches for the bits in the
graphics stream.
CUR_COLOR_KEY (Cursor Color Key). Specifies the 24-bit RGB value of the cursor color key. The incoming graphics
stream is compared with this value. If a match is detected, the pixel is replaced by a 24-bit value from one of the Cursor
Color registers.
Reserved
CUR_COLOR_MASK (Cursor Color Mask). This mask is a 24-bit value. Zeroes in the mask cause the corresponding bits
in the incoming graphics stream to be ignored.
COLOR_CHROMA_SEL = 1) color key comparison is not performed outside the alpha windows.
Mixing and blending configurations are created using bits [13, 11:9] of this register. See Table 6-1 "Valid Mix-
ing/Blending Configurations" on page 327.
Mixing and blending configurations are created using bits [13, 11:9] of this register. See Table 6-1 "Valid Mix-
ing/Blending Configurations" on page 327.
(Continued)
Cursor Color Mask Register (R/W)
Cursor Color Key Register (R/W)
346
Reset Value: 00000000h
Reset Value: 00000000h
Revision 3.0