SAA7114HV2 NXP Semiconductors, SAA7114HV2 Datasheet - Page 57
SAA7114HV2
Manufacturer Part Number
SAA7114HV2
Description
Manufacturer
NXP Semiconductors
Datasheet
1.SAA7114HV2.pdf
(144 pages)
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Philips Semiconductors
SAA7114_3
Product data sheet
8.5.2 Video FIFO (subaddress 86h)
Table 16:
Table 17:
Table 18:
The video FIFO at the scaler output contains 32 Dwords. That corresponds to 64 pixels in
16-bit Y-C
actual available buffer capacity for the image port is much higher, and can exceed beyond
a video line.
The image port, and the video FIFO, can operate with the video source clock
(synchronous mode) or with an externally provided clock (asynchronous and burst mode),
as appropriate for the VGA controller or attached frame buffer.
The video FIFO provides 4 internal flags, reporting to what extent the FIFO is actually
filled.
These are:
The trigger levels for FAE and FAF are programmable by FFL[1:0] 86h[3:2] (16, 24, 28,
full) and FEL[1:0] 86h[1:0] (16, 8, 4, empty).
The state of this flag can be seen on pins IGP0 or IGP1. The pin mapping is defined by
subaddresses 84h and 85h; see
Output format
Y-C
Y-C
Y only
Name
C
Yn
C
Limit step
ILLV[85h[5]]
0
1
•
•
•
•
B
R
n
n
B
B
The FIFO Almost Empty (FAE) flag
The FIFO Combined Flag (FCF) or FIFO filled, which is set at almost full level and
reset, with hysteresis, only after the level crosses below the almost empty mark
The FIFO Almost Full (FAF) flag
The FIFO Overflow (FOVL) flag
-C
-C
R
R
4 : 2 : 2 C
4 : 1 : 1 C
B
Byte stream for different output formats
Explanation to
Limiting range on I port
-C
R
Valid range
Decimal value
1 to 254
8 to 247
4 : 2 : 2 format. But as the entire scaler can act as a pipeline buffer, the
Byte sequence for 8-bit output modes
Y0
Explanation
C
Y (luminance) component, pixel number n = 0, 1, 2, 3 to 719
C
B
B
B
R
0 Y0
0 Y0
(B
(R
Rev. 03 — 17 January 2006
Y1
Y) color difference component, pixel number n = 0, 2, 4 to 718
Y) color difference component, pixel number n = 0, 2, 4 to 718
Table 16
C
C
Y2
R
R
Hexadecimal value
01 to FE
08 to F7
0 Y1
0 Y1
Section
Y3
C
C
Y4
B
B
2 Y2
4 Y2
9.5.
Y5
C
C
Y6
R
R
Suppressed codes (hexadecimal value)
Lower range
00
00 to 07
2 Y3
4 Y3
PAL/NTSC/SECAM video decoder
Y7
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
C
Y4
Y8
B
4 Y4
Y5
Y9
C
Y6
Y10 Y11 Y12 Y13
SAA7114
R
Upper range
FF
F8 to FF
4 Y5
Y7
C
C
B
B
57 of 144
6 Y6
8 Y8
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