Datasheet

Functional Description
28
SLES099C—March 2007TVP5147PFP
2.7.2 VBI Raw Data Output
The TVP5147 decoder can output raw A/D video data at twice the sampling rate for external VBI slicing. This
is transmitted as an ancillary data block, although somewhat differently from the way the sliced VBI data is
transmitted in the FIFO format as described in Section 2.7.1. The samples are transmitted during the active
portion of the line. VBI raw data uses ITU-R BT.656 format having only luma data. The chroma samples are
replaced by luma samples. The TVP5147 decoder inserts a four-byte preamble 000h 3FFh 3FFh 180h before
data start. There are no checksum bytes and fill bytes in this mode.
Table 2−8. VBI Raw Data Output Format
BYTE
NO.
D9
(MSB)
D8 D7 D6 D5 D4 D3 D2 D1 D0
(LSB)
DESCRIPTION
0 0 0 0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1 1 1 1
VBI raw data preamble
2 1 1 1 1 1 1 1 1 1 1
VBI raw data preamble
3 0 1 1 0 0 0 0 0 0 0
4 1. Data
5 2. Data
2 il tl dt
: :
2× pixel rate luma data
(i e NTSC 601: n = 1707)
n−1 n−5. Data
(i
.e.,
NTSC
601
: n =
1707)
n n–4. Data
2.8 Reset and Initialization
Reset is initiated at power up or any time terminal 34 (RESETB) is brought low. Table 2−9 describes the status
of the TVP5147 terminals during and immediately after reset.
Table 2−9. Reset Sequence
SIGNAL NAME DURING RESET RESET COMPLETED
Y[9:0], C[9:0] Input High-impedance
RESETB, PWDN, SDA, SCL, FSS,
AVID, GLCO, HS, VS, FID
Input Input
INTREQ Input Output
DATACLK Output High-impedance
200 ns (min)
RESETB
(Pin 34)
1 ms (min)
Invalid I
2
C Cycle Valid
Normal Operation
Reset
1 ms (min)
SDA
(Pin 29)
POWER
(3.3 V and 1.8 V)
Figure 2−24. Reset Timing
The TVP5147 requires that pin 69 (C_1/GPIO) be held LOW. If using the 20-/16-bit mode or using this pin as
GPIO, then this pin must be pulled low through a 2.2-kΩ pulldown resistor (see Figure 5−1). If unused, this
pin can be shorted to ground. (Note: If using the 20-/16-bit mode and only using the 16 MSBs, it is possible
to short pin 69 to GND, but the current for IOVDD will increase by 2 or 3 mA.)