STV-6410-R01 datasheet(27/105 Pages) STMICROELECTRONICS

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CMOS Sensor; Customer Datasheet, Rev 3.0, 28 September 2000

VV5410 & VV6410

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Digital Video Interface Format

8.1

General description

The video interface consists of a bidirectional, tri-stateable 5-wire data bus. The nibble transmission is synchronised to the rising

edge of the system clock (Figure 31).

Digital video data may be either 8 or 10 bits per sample, and can be transmitted in one of the following ways:

10-bit data

1. A series pair of 5-bit nibbles, most signiﬁcant nibble ﬁrst, on 5 wires.

2. An 8-bit number e.g. line code. line numbers and status line data is padded with 00 in the least signiﬁcant two bits to make

up a 10-bit value.

8-bit data

1. A single 8 bit byte over 8 output wiresnote.

2. A series pair of 4-bit nibbles, most signiﬁcant nibble ﬁrst, on 4 wires.

3. The top 8-bits of a 10-bit value e.g. pixel data or line averages is used as the 8-bit equivalent.

note: if the 8-wire output mode has been selected then the normal FST/LST pin function is sacrificed as these pins are required

to output data information

In the following description the 4-wire mode is used as an example. The 5-wire mode can be viewed as a variant of the 4-wire

mode. Data is output on the least significant data wires available. e.g. in 4-wire mode, data is output on data wires D[3:0] while in

Read-out Order

Progressive Scan (Non-interlaced)

Form of encoding

Uniformly quantised, PCM, 8/10 bits per sample

Correspondence between video signal

levels and quantisation levels:

The internal10-bit pixel data is clipped to ensure that 0H and 3FFH (5

Wire) or FFH (4/8 Wire) values do not occur when pixel data is being

output on the data bus.

10-Bit Data

8-Bit Data

Pixel Values

1 to 1022

Pixel Values

1 to 254

Black Level

Table 10 : Video encoding parameters

Figure 12 : Possible Output Modes

4 - wire Output Mode

D9,D8,D7,D6

D5,D4,D3,D2

D9,D8,D7,D6

8-bit Pixel Data

10-bit Pixel Data

5 - wire Output Mode

D9,D8,D7,D6,D5

D4,D3,D2,D1,D0

D9,D8,D7,D6,D5

8- wire Output Mode

D9,D8,D7,D6,D5,D4,D3,D2

D9,D8,D7.........

....D2,D1,D0

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