MAX16065 Datasheet, PDF (46/61 Pages) Maxim Integrated Products – 12-Channel/8-Channel, Flash-Configurable System Managers with Nonvolatile Fault Registers

12-Channel/8-Channel, Flash-Configurable System
Managers with Nonvolatile Fault Registers
Send Byte Format
S ADDRESS R/W ACK COMMAND ACK P
Receive Byte Format
S ADDRESS R/W ACK
DATA NACK P
7 bits
00
8 bits
0
Slave Address: Address
of the slave on the serial
interface bus.
Data Byte: Presets the internal
address pointer or represents
a command.
7 bits
10
8 bits
1
Slave Address: Address
of the slave on the serial
interface bus.
Data Byte: Data is read from
the location pointed to by the
internal address pointer.
Write Byte Format
S ADDRESS R/W ACK COMMAND ACK
DATA ACK P
SMBALERT#
S ADDRESS R/W ACK
DATA NACK P
7 bits
00
8 bits
0
8 bits
0
0001100 D.C. 0
8 bits
1
Slave Address: Address
of the slave on the serial
interface bus.
Read Byte Format
Command Byte:
Sets the internal
address pointer.
Data Byte: Data is written to
the locations set by the
internal address pointer.
S
SLAVE
ADDRESS
R/W ACK COMMAND ACK SR
SLAVE
ADDRESS
R/W ACK
7 bits
00
8 bits
0
7 bits
10
Alert Response Address:
Only the device that
interrupted the master
responds to this address.
DATA BYTE NACK P
8 bits
1
Slave Address: Slave places
its own address on the
serial bus.
Slave Address: Address
of the slave on the serial
interface bus.
Command Byte:
Sets the internal
address pointer.
Data Byte: Data is written to
the locations set by the
internal address pointer.
Block Write Format
S
ADDRESS
R/W ACK
COMMAND
ACK
BYTE
COUNT = N
ACK DATA BYTE 1 ACK DATA BYTE … ACK DATA BYTE N ACK
P
7 bits
00
8 bits
0
8 bits
0
8 bits
0
8 bits
0
8 bits
0
Slave Address: Address
of the slave on the
serial interface bus.
Command Byte:
FAh
Data Byte: Data is written to the locations
set by the internal address pointer.
Slave to master
Master to slave
Block Read Format
S ADDRESS R/W ACK COMMAND ACK SR
7 bits
00
8 bits
0
ADDRESS
7 bits
R/W ACK
10
BYTE
COUNT = N
8 bits
ACK DATA BYTE N ACK DATA BYTE … ACK DATA BYTE N NACK P
0
8 bits
0
8 bits
0
8 bits
1
Slave Address: Address
of the slave on the
serial interface bus.
Write Byte Format with PEC
Command Byte:
FBh
Slave Address: Address
of the slave on the
serial interface bus.
Data Byte: Data is read from the locations
set by the internal address pointer.
S ADDRESS R/W ACK COMMAND ACK DATA ACK PEC ACK P
7 BITS 0 0
8 BITS
0
8 BITS
0
8 BITS 0
Read Byte Format with PEC
S ADDRESS R/W ACK COMMAND ACK SR ADDRESS R/W ACK
7 BITS
00
8 BITS
0
7 BITS
10
DATA
8 BITS
ACK PEC
0
8 BITS
ACK P
0
Block Write with PEC
S ADDRESS R/W ACK COMMAND ACK BYTE COUNT N ACK DATA BYTE 1 ACK DATA BYTE ACK DATA N
7 BITS
00
8 BITS
0
8 BITS
0
8 BITS 0
8 BITS
0 8 BITS
ACK PEC
0
8 BITS
ACK P
0
Block Read with PEC
S ADDRESS R/W ACK COMMAND ACK SR
7 BITS
0 0 8 BITS
0
ADDRESS R/W ACK BYTE COUNT N ACK DATA BYTE 1 ACK DATA BYTE ACK
7 BITS 1 0
8 BITS
0 8 BITS
0
8 BITS
0
DATA N ACK
8 BITS
0
PEC
8 BITS
S = START Condition
ACK = Acknowledge, SDA pulled low during rising edge of SCL.
P = STOP Condition
NACK = Not acknowledge, SDA left high during rising edge of SCL.
Sr = REPEATED START Condition
D.C. = Don’t Care
All data is clocked in/out of the device on rising edges of SCL.
= SDA transitions from high to low during period of SCL.
= SDA transitions from low to high during period of SCL.
NACK P
1
Figure 14. SMBus Protocols
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