CY28RS400 Cypress Semiconductor, CY28RS400 Datasheet - Page 4

• Manufacturer Part Number: CY28RS400
• Description: Clock Generator for ATI RS400 Chipset
• Manufacturer: Cypress Semiconductor

Document #: 38-07637 Rev. *B
Table 4. Block Read and Block Write Protocol (continued)
Table 5. Byte Read and Byte Write Protocol
27:20
36:29
45:38
18:11
27:20
8:2
Bit
Bit
28
37
46
....
....
....
....
10
19
28
29
1
9
Byte Count – 8 bits
Acknowledge from slave
Data byte 1 – 8 bits
Acknowledge from slave
Data byte 2 – 8 bits
Acknowledge from slave
Data Byte /Slave Acknowledges
Data Byte N –8 bits
Acknowledge from slave
Stop
Start
Slave address – 7 bits
Write
Acknowledge from slave
Command Code – 8 bits
Acknowledge from slave
Data byte – 8 bits
Acknowledge from slave
Stop
Block Write Protocol
Byte Write Protocol
Description
Description
27:21
37:30
46:39
55:48
27:21
37:30
18:11
Bit
20
28
29
38
47
56
....
....
....
8:2
Bit
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
Data byte 1 from slave – 8 bits
Acknowledge
Data byte 2 from slave – 8 bits
Acknowledge
Data bytes from slave / Acknowledge
Data Byte N from slave – 8 bits
NOT Acknowledge
Start
Slave address – 7 bits
Write
Acknowledge from slave
Command Code – 8 bits
Acknowledge from slave
Repeated start
Slave address – 7 bits
Read
Acknowledge from slave
Data from slave – 8 bits
NOT Acknowledge
Stop
Block Read Protocol
Byte Read Protocol
Description
Description
CY28RS400
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