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BT861KRF 参数 Datasheet PDF下载

BT861KRF图片预览
型号: BT861KRF
PDF下载: 下载PDF文件 查看货源
内容描述: 多端口的YCrCb到NTSC / PAL / SECAM数字视频编码器 [Multiport YCrCb to NTSC / PAL / SECAM Digital Video Encoder]
分类和应用: 商用集成电路编码器
文件页数/大小: 111 页 / 1232 K
品牌: CONEXANT [ CONEXANT SYSTEMS, INC ]
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Bt860/861  
5.0 Serial Programming Interface and Registers  
5.1 Serial Interface  
Multiport YCrCb to NTSC/PAL /SECAM  
Figure 5-2. Serial Programming Interface Typical Write Sequence  
Chip Write  
Address  
88 or 8A  
S
A
Sub Address  
A
Data  
A
Data  
A
P
Optional Sequential  
Write May be Repeated  
S = Start Condition  
P = Stop Condition  
A = Acknowledge  
From Master  
From Bt860/861  
861_036  
5.1.3 Reading Data  
A read transaction involves sending the device address byte with the read/write*  
bit high, and receiving one or more bytes after changing the direction of the bus.  
The first byte returned after the device address byte is the contents of the last  
indexed register subaddress. Any subsequent data bytes read come from registers  
whose address follows in ascending order as the internal subaddress pointer is  
incremented at the completion of every read. The initial register subaddress  
depends on the state of the pointer at the end of the last write transaction. Because  
writing even one data byte to a register will increment the subaddress pointer,  
typically one would want to precede a read with a write transaction that sends  
only the register subaddress byte.  
Figure 5-3 illustrates a typical register read sequence.  
1. Master transmits the device address with the read/write* bit low.  
2. Master transmits the desired register subaddress.  
3. Master generates repeat start.  
4. Master transmits the device address with the read/write* bit high.  
5. Slave (Bt860/861) transmits the data byte to master.  
6. Subsequent registers are read until a stop condition is detected.  
Figure 5-3. Serial Programming Interface Typical Read Sequence  
Chip Write  
Address  
Chip Read  
Address  
S
A
Sub Address  
A
Sr  
A
Data  
A
Data  
NA P  
88 or 8A  
89 or 8B  
Optional Sequential  
Read May be Repeated  
S = Start Condition  
P = Stop Condition  
From Master  
From Bt860/861  
A = Acknowledge  
Sr = Repeat Start Condition  
NA = Not Acknowledged  
861_037  
D860DSA  
Conexant  
5-3  
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