CY28359
Table 2. Block Read and Block Write Protocol
Block Write Protocol
Block Read Protocol
Description
Bit
1
Description
Bit
1
Start
Start
2:8
9
Slave address – 7 bits
Write = 0
2:8
9
Slave address – 7 bits
Write = 0
10
Acknowledge from slave
10
Acknowledge from slave
Command Code – 8 bits
'00000000' stands for block operation
Acknowledge from slave
Repeat start
11:18
Command Code – 8 bits
'00000000' stands for block operation
11:18
19
20:27
28
Acknowledge from slave
Byte Count – 8 bits
Acknowledge from slave
Data byte 1 – 8 bits
Acknowledge from slave
Data byte 2 – 8 bits
Acknowledge from slave
......................
19
20
21:27
28
Slave address – 7 bits
Read = 1
29:36
37
29
Acknowledge from slave
Byte count from slave – 8 bits
Acknowledge from master
Data byte from slave – 8 bits
Acknowledge from master
Data byte from slave – 8 bits
Acknowledge from master
Data byte N from slave – 8 bits
Acknowledge from master
Stop
38:45
46
30:37
38
....
39:46
47
....
Data Byte (N–1) – 8 bits
Acknowledge from slave
Data Byte N – 8 bits
Acknowledge from slave
Stop
....
48:55
56
....
....
....
....
....
....
Table 3. Byte Read and Byte Write Protocol
Byte Write Protocol
Byte Read Protocol
Description
Bit
1
Description
Bit
1
Start
Start
2:8
9
Slave address – 7 bits
Write = 0
2:8
9
Slave address – 7 bits
Write = 0
10
Acknowledge from slave
10
Acknowledge from slave
11:18
Command Code – 8 bits
11:18
Command Code – 8 bits
'1XXxxxxx' stands for byte operation,bit[6:5] for
Device selection bits for multiple device selection,
bits[4:0] of the command code represents the offset
of the byte to be accessed
'1XXxxxxx' stands for byte operation,bit[6:5] for
Device selection bits for multiple device selection,
bits[4:0] of the command code represents the
offset of the byte to be accessed
19
20:27
28
Acknowledge from slave
Data byte from master – 8 bits
Acknowledge from slave
Stop
19
20
Acknowledge from slave
Repeat start
21:27
28
Slave address – 7 bits
Read = 1
29
29
Acknowledge from slave
Data byte from slave – 8 bits
Acknowledge from master
Stop
30:37
38
40
Rev 1.0,November 24, 2006
Page 3 of 7
SPECTRALINEAR [ SPECTRALINEAR INC ]
