CY28301 Cypress Semiconductor, CY28301 Datasheet - Page 4

• Manufacturer Part Number: CY28301
• Description: Frequency Generator for Intel Integrated Chipset
• Manufacturer: Cypress Semiconductor

Table 3. Word Read and Word Write Protocol
Table 4. Byte Read and Byte Write Protocol
Document #: 38-07011 Rev. *C
11:18
20:27
29:36
11:18
20:27
Bit
2:8
Bit
2:8
10
19
28
37
38
10
19
28
29
1
9
1
9
Start
Slave address – 7 bits
Write
Acknowledge from slave
Command Code – 8-bits
‘1xxxxxxx’ stands for byte or word operation
bit[6:0] of the command code represents the
offset of the byte to be accessed
Acknowledge from slave
Data byte low – 8 bits
Acknowledge from slave
Data byte high – 8 bits
Acknowledge from slave
Stop
Start
Slave address – 7 bits
Write
Acknowledge from slave
Command code 8 – bits
‘1xxxxxxx’ stands for byte operation
bit[6:0] of the command code represents the
offset of the byte to be accessed
Acknowledge from slave
Data byte 8 – bits
Acknowledge from slave
Stop
Word Write Protocol
Byte Write Protocol
Description
Description
11:18
21:27
30:37
39:46
11:18
21:27
30:37
2:8
2:8
Bit
Bit
20
28
38
47
48
20
28
29
38
39
10
19
29
10
19
1
9
1
9
Start
Slave address – 7 bits
Write
Acknowledge from slave
Command code – 8 bits
‘1xxxxxxx’ stands for byte or word operation
bit[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
Acknowledge from slave
Data byte low from slave – 8 bits
Acknowledge
Data byte high from slave – 8 bits
Not acknowledge
Stop
Start
Slave address – 7 bits
Write
Acknowledge from slave
Command code – 8 bits
‘1xxxxxxx’ stands for byte operation
bit[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
Acknowledge from slave
Data byte from slave – 8 bits
Not Acknowledge
Stop
Word Read Protocol
Byte Read Protocol
Description
Description
CY28301
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