Texas Instruments TVP5147M1PFP VBI Raw Data Output, Reset and Initialization, 9. Reset Sequence

Functional Description

2.7.2 VBI Raw Data Output

The TVP5147M1 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 TVP5147M1 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	D8	D7	D6	D5	D4	D3	D2	D1	D0	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

2.8Reset 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 TVP5147M1 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,	Input	Input
AVID, GLCO, HS, VS, FID
INTREQ	Input	Output
DATACLK	Output	High-impedance

POWER (3.3 V and 1.8 V)

1 ms (min)

200 ns (min)

RESETB (Pin 34)

SDA (Pin 29)

Normal Operation

Reset

1 ms (min)

Invalid I2C Cycle Valid

Figure 2−18. Reset Timing

The following register writes must be made before normal operation of the device.

	STEP	I2C SUBADDRESS	I2C DATA
	1	0x03	0x01
	2	0x03	0x00
26	TVP5147M1PFP		SLES140A—March 2007