
CY28547
.......................Document #: 001-05103 Rev *B Page 5 of 24
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Table 5. Byte Read and Byte Write Protocol
Byte Write Protocol
Byte Read Protocol
Bit
Description
Bit
Description
1Start
8:2
Slave address–7 bits
8:2
Slave address–7 bits
9Write
10
Acknowledge from slave
10
Acknowledge from slave
18:11
Command Code–8 bits
18:11
Command Code–8 bits
19
Acknowledge from slave
19
Acknowledge from slave
27:20
Data byte–8 bits
20
Repeated start
28
Acknowledge from slave
27:21
Slave address–7 bits
29
Stop
28
Read
29
Acknowledge from slave
37:30
Data from slave–8 bits
38
NOT Acknowledge
39
Stop
Table 4. Block Read and Block Write Protocol (continued)
Block Write Protocol
Block Read Protocol
Bit
Description
Bit
Description
Control Registers
Byte 0 Control Register 0
Bit
@Pup
Name
Description
7
0
RESEREVD
RESERVED
6
0
RESEREVD
RESERVED
5
0
RESEREVD
RESERVED
4
0
iAMT_EN
Set via SMBus or by combination of PD, CPU_STP and PCI_STP
0 = Legacy mode, 1 = iAMT enable
3
0
RESEREVD
RESERVED
2
0
RESEREVD
RESERVED
1
0
RESEREVD
RESERVED
0
1
PD_Restore
Save configuration in PD
0 = Configuration cleared, 1 = Configuration saved
Byte 1 Control Register 1
Bit
@Pup
Name
Description
7
1
SRC[T/C]7
SRC[T/C]7 Output Enable
0 = Disabled, 1 = Enabled
6
1
SRC[T/C]6
SRC[T/C]6 Output Enable
0 = Disabled, 1 = Enabled
5
1
SRC[T/C]5
SRC[T/C]5 Output Enable
0 = Disabled, 1 = Enabled
4
1
SRC[T/C]4
SRC[T/C]4 Output Enable
0 = Disabled, 1 = Enabled
3
1
SRC[T/C]3
SRC[T/C]3 Output Enable
0 = Disabled, 1 = Enabled