cy28508 SpectraLinear Inc, cy28508 Datasheet - Page 3

• Manufacturer Part Number: cy28508
• Description: 333 Mhz Low-voltage Differential Sscg
• Manufacturer: SpectraLinear Inc

Rev 1.0, November 24, 2006
Table 1. Command Code Definition
Table 2. Block Read and Block Write Protocol
Table 3. Byte Read and Byte Write Protocol
20:27
29:36
38:45
20:27
11:18
11:18
2:8
2:8
Bit
Bit
10
19
28
37
46
....
....
....
....
10
19
28
29
(6:0)
1
9
1
9
Bit
7
Slave address – 7 bits
Command Code – 8 bits
Data Byte N – 8 bits
Acknowledge from slave
Stop
Slave address – 7 bits
Command Code – 8 bits
Start
Write = 0
Acknowledge from slave
‘00000000’ stands for block operation
Acknowledge from slave
Byte Count from master – 8 bits
Acknowledge from slave
Data byte 0 from master – 8 bits
Acknowledge from slave
Data byte 1 from master – 8 bits
Acknowledge from slave
Data bytes from master/Acknowledge
Start
Write = 0
Acknowledge from slave
‘1xxxxxxx’ stands for byte operation, bits[6:0] of
the command code represents the offset of the
byte to be accessed
Acknowledge from slave
Data byte from master – 8 bits
Acknowledge from slave
Stop
0 = Block read or block write operation
1 = Byte read or byte write operation
Byte offset for byte read or byte write operation. For block read or block write operations, these bits should
be ‘0000000’
Block Write Protocol
Byte Write Protocol
Description
Description
Description
21:27
30:37
39:46
48:55
21:27
30:37
11:18
11:18
2:8
2:8
Bit
Bit
10
19
20
28
29
38
47
56
....
....
....
....
10
19
20
28
29
38
39
1
9
1
9
Start
Slave address – 7 bits
Write = 0
Acknowledge from slave
Command Code – 8 bits
‘00000000’ stands for block operation
Acknowledge from slave
Repeat start
Slave address – 7 bits
Read = 1
Acknowledge from slave
Byte count from slave – 8 bits
Acknowledge
Data byte 0 from slave – 8 bits
Acknowledge
Data byte 1 from slave – 8 bits
Acknowledge
Data bytes from slave/Acknowledge
Data byte N from slave – 8 bits
Not Acknowledge
Stop
Start
Slave address – 7 bits
Write = 0
Acknowledge from slave
Command Code – 8 bits
‘1xxxxxxx’ stands for byte operation, bits[6:0]
of the command code represents the offset of
the byte to be accessed
Acknowledge from slave
Repeat start
Slave address – 7 bits
Read = 1
Acknowledge from slave
Data byte from slave – 8 bits
Not Acknowledge
Stop
Block Read Protocol
Byte Read Protocol
Description
Description
CY28508
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