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CY28437OXC 参数 Datasheet PDF下载

CY28437OXC图片预览
型号: CY28437OXC
PDF下载: 下载PDF文件 查看货源
内容描述: 时钟发生器为英特尔的Grantsdale芯片组 [Clock Generator for Intel Grantsdale Chipset]
分类和应用: 时钟发生器
文件页数/大小: 22 页 / 195 K
品牌: SPECTRALINEAR [ SPECTRALINEAR INC ]
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CY28437  
system controller can access individually indexed bytes. The  
offset of the indexed byte is encoded in the command code,  
as described in Table 1.  
Data Protocol  
The clock driver serial protocol accepts byte write, byte read,  
block write, and block read operations from the controller. For  
block write/read operation, the bytes must be accessed in  
sequential order from lowest to highest byte (most significant  
bit first) with the ability to stop after any complete byte has  
been transferred. For byte write and byte read operations, the  
The block write and block read protocol is outlined in Table 2  
while Table 3 outlines the corresponding byte write and byte  
read protocol. The slave receiver address is 11010010 (D2h).  
Table 1. Command Code Definition  
Bit  
Description  
7
0 = Block read or block write operation, 1 = Byte read or byte write operation  
(6:0)  
Byte offset for byte read or byte write operation. For block read or block write operations, these bits should be  
'0000000'  
Table 2. Block Read and Block Write Protocol  
Block Write Protocol  
Block Read Protocol  
Description  
Bit  
1
Description  
Bit  
1
Start  
Start  
8:2  
9
Slave address – 7 bits  
Write  
8:2  
9
Slave address – 7 bits  
Write  
10  
Acknowledge from slave  
Command Code – 8 bits  
Acknowledge from slave  
10  
Acknowledge from slave  
Command Code – 8 bits  
Acknowledge from slave  
Repeat start  
18:11  
19  
18:11  
19  
27:20  
Byte Count – 8 bits  
(Skip this step if I2C_EN bit set)  
20  
28  
36:29  
37  
Acknowledge from slave  
Data byte 1 – 8 bits  
27:21  
28  
Slave address – 7 bits  
Read = 1  
Acknowledge from slave  
Data byte 2 – 8 bits  
29  
Acknowledge from slave  
Byte Count from slave – 8 bits  
Acknowledge  
45:38  
46  
37:30  
38  
Acknowledge from slave  
Data Byte /Slave Acknowledges  
Data Byte N – 8 bits  
Acknowledge from slave  
Stop  
....  
46:39  
47  
Data byte 1 from slave – 8 bits  
Acknowledge  
....  
....  
55:48  
56  
Data byte 2 from slave – 8 bits  
Acknowledge  
....  
....  
Data bytes from slave / Acknowledge  
Data Byte N from slave – 8 bits  
NOT Acknowledge  
....  
....  
....  
Stop  
Table 3. Byte Read and Byte Write Protocol  
Byte Write Protocol  
Byte Read Protocol  
Description  
Bit  
1
Description  
Bit  
1
Start  
Start  
8:2  
9
Slave address – 7 bits  
Write  
8:2  
9
Slave address – 7 bits  
Write  
10  
Acknowledge from slave  
Command Code – 8 bits  
Acknowledge from slave  
Data byte – 8 bits  
10  
Acknowledge from slave  
Command Code – 8 bits  
Acknowledge from slave  
Repeated start  
18:11  
19  
18:11  
19  
27:20  
20  
Rev 1.0,November 20, 2006  
Page 4 of 22