CY28400OC Silicon Laboratories Inc, CY28400OC Datasheet - Page 3

• Manufacturer Part Number: CY28400OC
• Description: Clock Buffer 100 MHz Diff Buffer PCI Express & SATA
• Manufacturer: Silicon Laboratories Inc

Specifications of CY28400OC

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Rev 1.0, November 21, 2006
Table 2. Block Read and Block Write Protocol (continued)
Table 3. Byte Read and Byte Write Protocol
Byte 0: Control Register 0
11:18
20:27
Bit
20:27
29:36
38:45
Bit
2:8
10
19
28
29
7
6
5
4
3
2
1
9
Bit
28
37
46
....
....
....
....
Start
Slave address – 7 bits
Write = 0
Acknowledge from slave
Command Code – 8 bits
'100xxxxx' 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
@Pup
Data bytes from master/Acknowledge
Data Byte N – 8 bits
Acknowledge from slave
Stop
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
0
0
0
0
0
1
Block Write Protocol
Byte Write Protocol
HIGH_BW#
Description
Description
Name
PWRDWN# drive mode
0 = Driven when stopped, 1 = Three-state
SRC_STOP# drive mode
0 = Driven when stopped, 1 = Three-state
Reserved
Reserved
Reserved
HIGH_BW#
0 = High Bandwidth, 1 = Low bandwidth
21:27
30:37
39:46
48:55
Bit
20
28
29
38
47
56
....
....
....
....
21:27
30:37
11:18
Bit
2:8
10
19
20
28
29
38
39
1
9
Repeat start
Slave address – 7 bits
Read = 1
Acknowledge from slave
Byte count from slave – 8 bits
Acknowledge from host
Data byte 0 from slave – 8 bits
Acknowledge from host
Data byte 1 from slave – 8 bits
Acknowledge from host
Data bytes from slave/Acknowledge
Data byte N from slave – 8 bits
Acknowledge from host
Stop
Start
Slave address – 7 bits
Write = 0
Acknowledge from slave
Command Code – 8 bits
'100xxxxx' 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
Acknowledge from master
Stop
Description
Block Read Protocol
Byte Read Protocol
Description
Description
CY28400
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