MAX16070 Datasheet, PDF (34/52 Pages) Maxim Integrated Products – 12-Channel/8-Channel, Flash-Configurable System Monitors 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 read from
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:
A5h
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
BYTE
COUNT = N
ACK DATA BYTE 1 ACK DATA BYTE … ACK DATA BYTE N NACK
P
10
8 bits
0
8 bits
0
8 bits
0
8 bits
1
Slave Address: Address
of the slave on the
serial interface bus.
Command Byte:
A6h
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.
Write Byte Format with PEC
S ADDRESS R/W A COMMAND A
DATA
A
PEC
AP
7 BITS 0 0
8 BITS
0
8 BITS
0
8 BITS 0
Read Byte Format with PEC
S ADDRESS R/W A COMMAND A SR ADDRESS R/W A
DATA
A
PEC
NP
7 BITS
00
8 BITS
0
7 BITS
1 0 8 BITS
0
8 BITS
1
Block Write with PEC
S ADDRESS R/W A
COMMAND
A BYTE COUNT N A
DATA BYTE 1 A
7 BITS
00
8 BITS
0
8 BITS
0
8 BITS 0
DATA BYTE _A
8 BITS 0
DATA N
8 BITS
A
PEC
0
8 BITS
AP
0
Block Read with PEC
S ADDRESS R/W A COMMAND
7 BITS
00
8 BITS
A SR
0
ADDRESS R/W A BYTE COUNT N A DATA BYTE 1 A
7 BITS 1 0
8 BITS
0
8 BITS
0
DATA BYTE _{A DATA BYTE N A}
8 BITS
0
8 BITS
0
S = START Condition
P = STOP Condition
Sr = Repeated START Condition
D.C. = Don’t Care
ACK = Acknowledge, SDA pulled low during rising edge of SCL.
NACK = Not acknowledge, SDA left high during rising edge of SCL.
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.
PEC
8 BITS
NP
1
Figure 11. SMBus Protocols
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