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參數資料
| 型號： | 935243460557 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 顏色信號轉換 |
| 英文描述： | COLOR SIGNAL ENCODER, PQFP44 |
| 封裝： | PLASTIC, SOT-307, QFP-44 |
| 文件頁數： | 3/35頁 |
| 文件大?。?/td> | 261K |
| 代理商： | 935243460557 |
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1997 Jan 06
11
Philips Semiconductors
Preliminary specication
Digital Video Encoder (ConDENC)
SAA7120; SAA7121
I2C-bus interface
The I2C-bus interface is a standard slave transceiver,
supporting 7-bit slave addresses and 400 kbits/s
guaranteed transfer rate. It uses 8-bit subaddressing with
an auto-increment function. All registers are write only,
except one readable status byte.
Two I2C-bus slave addresses are present:
88H: LOW at pin SA
8CH: HIGH at pin SA.
Tables 5 and 4 summarize the format of the I2C-bus
addressing. For more information on how to use the
I2C-bus see
“The I2C-bus and how to use it”, order
no. 9398 393 40011. Tables 7 to 42 contain the
programming information for the subaddresses. Table 6
summarises this information.
Table 3
8-bit multiplexed format (similar to
“CCIR 601”)
Table 4
I2C-bus address format; see Table 5
Table 5
Explanation of Table 4
Notes
1. x is the read/write control bit; write:
x = logic 0;
read: x = logic 1, no subaddressing with read.
2. If more than 1 byte DATA is transmitted, then auto-increment of the subaddress is performed.
BITS
0
122
4
567
Sample
Cb0
Y0
Cr0
Y1
Cb2
Y2
Cr2
Y3
Luminance pixel number
0
1
2
3
Colour pixel number
0
2
S
SLAVE ADDRESS
ACK
SUBADDRESS
ACK
DATA 0
ACK
--------
DATA n
ACK
P
PART
DESCRIPTION
S
START condition
Slave address
1000100x or 1000110x (1)
ACK
acknowledge, generated by the slave
Subaddress(2)
subaddress byte
DATA
data byte
--------
continued data bytes and ACKs
P
STOP condition
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