Datasheet

TVP5146M2

SLES141H –JULY 2005– REVISED FEBRUARY 2012

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2.7.2 VBI Raw Data Output

The TVP5146M2 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 TVP5146M2 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 D9 D0

D8 D7 D6 D5 D4 D3 D2 D1 DESCRIPTION

NO. (MSB) (LSB)

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

3 0 1 1 0 0 0 0 0 0 0

4 1. Data

5 2. Data

2× pixel rate luma data

⋮ ⋮

(i.e., NTSC 601: n = 1707)

n-1 n-5. Data

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 TVP5146M2 terminals during and immediately after reset.

Table 2-9. Reset Sequence

SIGNAL NAME DURING RESET RESET COMPLETED

Y_[9:0], C_[9:0]/GPIO Input High impedance

RESETB, PWDN, SDA, SCL, FSS/GPIO, AVID/GPIO, GLCO/I2CA,

Input Input

HS/CS/GPIO, VS/VBLK/GPIO, FID

INTREQ Input Output

DATACLK Output High impedance

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