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參數(shù)資料
| 型號(hào)： | STV0502 |
| 廠(chǎng)商： | 意法半導(dǎo)體 |
| 英文描述： | CCD SENSORS ANALOG PROCESSOR IC |
| 中文描述： | CCD傳感器模擬處理器IC |
| 文件頁(yè)數(shù)： | 5/15頁(yè) |
| 文件大?。?/td> | 158K |
| 代理商： | STV0502 |
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FUNCTIONAL DESCRIPTION
(continued)
3 - Serial Bus Specification
It is a 2-wires (data and clock) serial bus, used as
a slave.
Clock line is monodirectional (input) and allways
sent by the master to the chip, whereas Data line
is bidirectional (I/O).
There are 3 registers (8 bits), both writable/readable.
Each register can be addressed by a 4 bits address
word, followed by a R/W bit, and an 8 bits word Data
(read/write).
2 main patterns can be sent : Reset Pattern and
Read/Write pattern.
3.1 -Timings and Protocol
The data bit is taken into account when the clock
is rising.
- Reset Pattern : resets all the registers to their
default (Power On) values :
format = 16 * (data=1) | 2 * (data=0)
(total = 18 clocks)
- Read/Write Pattern :
format = 4 addr bits | R/W bit | 8 data bits
(total = 13 clocks)
Figure 3
Please note that :
1/ On power On conditions, SDATA line is in Write
(Input) Mode.
2/ In case of a read pattern, the SDATA line is
automatically set to Read (Output mode) during
8 clock cycles (Data D7 - D0) after R/W bit has
been sent, and comes back in Write (Input
mode) after the 13th clock cycle.
3/ There is no timing restriction between two
consecutive patterns (a pattern being defined
as one of the two above).
3.2 - Register Summary
Register
Address
(A3-A0)
0000
0001
0001
0001
0010
Data Format
(D7-D0)
DDDD.DDDD
XXXD.DDDD
XXDX.XXXX
DDXX.XXXX
XXXX.XXXD
Video Amplifier Gain
Black Level Adjust
Video High Gain Select
Test Mode
Microphone AGC
X
D
Please note that 3 different functions are merged
in register address 01.
: unused bits
: means useful bits
CLK
SDATA
Reset Pattern
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1
2
2 CLK Cycles
Minimum 16 CLK Cycles
0
CLK
SDATA
Read/Write Pattern
A3
A2
A1
A0
R/W
D7
D6
D5
D4
D3
D2
D1
D0
1
2
3
4
5
6
7
8
9
10
11
12
13
0
Figure 4
STV0502
5/15
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