STV-5301-E01 Ver la hoja de datos (PDF) - Vision

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STV-5301-E01

Mono and Colour QSIF Digital Video CMOS Image Sensors

Vision 

CMOS Sensor; Customer Datasheet, Rev 3.0, 25 September 2000

VV5301 & VV6301

signal transition that allows a video processor to determine the position of the word boundaries in the serial stream of nibbles.

Combined escape and sync characters are always followed by a command byte - making up the four byte minimum embedded

control sequence.

7.1.2 The command word

The byte that follows the combined escape/sync characters defines the type of embedded control data. Three of the 8 bits are

used to carry the control information, four are ‘parity bits’ that allow the video processor to detect and correct a certain level of

errors in the transmission of the command words, the remaining bit is always set to 1 to ensure that the command word never has

the value 00H. The coding scheme used allows the correction of single bit errors (in the 8-bit sequence) and the detection of 2 bit

errors.The even parity bits are based on the following relationships:

1. An even number of ones in the 4-bit sequence (C2, C1, C0 and P0).

2. An even number of ones in the 3-bit sequence (C2, C1, P1).

3. An even number of ones in the 3-bit sequence (C2, C0, P2).

4. An even number of ones in the 3-bit sequence (C1, C0, P3).

Table 8 shows how the parity bits maybe used to detect and correct 1-bit errors and detect 2-bit errors.

Line Code

Nibble XH (1 C2 C1 C0)

Nibble YH (P3 P2 P1 P0)

End of Line

Blank Line (BL)

Black line (BK)

Visible Line (VL)

Start of Field (SOF)

End of Field (EOF)

10002 (8H)

00002 (0H)

10012 (9H)

11012 (DH)

10102 (AH)

10112 (BH)

10112 (BH)

01102 (6H)

11002 (CH)

01112 (7H)

11012 (DH)

10102 (AH)

Table 7 : Embedded Line Codes (for 4 wire output mode)

Parity Checks

P3

P2

P1

P0

Comment

Code word un-corrupted

$

P0 corrupted, line code OK

$

P1 corrupted, line code OK

$

P2 corrupted, line code OK

$

P3 corrupted, line code OK

$

$

$

C0 corrupted, invert sense of C0

$

$

$

C1 corrupted, invert sense of C1

$

$

$

C2 corrupted, invert sense of C2

All other codes

2-bit error in code word.

Table 8 : Parity Checking

cd5301_6301f-3-0.fm

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