MAX16031 Datasheet, PDF (33/42 Pages) Maxim Integrated Products – EEPROM-Based System Monitors with Nonvolatile Fault Memory

EEPROM-Based System Monitors
with Nonvolatile Fault Memory
Send Byte Format
S ADDRESS R/W ACK COMMAND ACK P
7 bits
0
Slave Address: Address
of the slave on the serial
interface bus.
8 bits
Data Byte: Presets the internal
address pointer or represents
a command.
Receive Byte Format
S ADDRESS R/W ACK DATA NACK P
7 bits
1
Slave Address: Address
of the slave on the serial
interface bus.
8 bits
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
7 bits
0
Slave Address: Address
of the slave on the serial
interface bus.
8 bits
Command Byte:
Sets the internal
address pointer.
8 bits
Data Byte: Data is written to
the locations set by the
internal address pointer.
SMBALERT#
S ADDRESS R/W ACK DATA NACK P
0001100 D.C.
Alert Response Address:
Only the device that
interrupted the master
responds to this address.
8 bits
Slave Address: Slave places
its own address on the
serial bus.
Read Byte Format
S
SLAVE
ADDRESS
R/W ACK COMMAND ACK SR
7 bits
0
8 bits
Slave Address: Address
of the slave on the serial
interface bus.
Command Byte:
Sets the internal
address pointer.
SLAVE
ADDRESS
7 bits
R/W ACK DATA BYTE NACK P
1
8 bits
Data Byte: Data is written to
the locations set by the
internal address pointer.
Block Write Format
S
ADDRESS
WR ACK COMMAND
ACK
BYTE
COUNT = N
ACK DATA BYTE 1 ACK DATA BYTE … ACK DATA BYTE N ACK
P
7 bits
0
8 bits
8 bits
8 bits
8 bits
8 bits
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 WR ACK COMMAND ACK SR
ADDRESS
WR ACK
BYTE
COUNT = N
ACK DATA BYTE N ACK DATA BYTE … ACK DATA BYTE N NACK
P
7 bits
0
8 bits
7 bits
1
8 bits
8 bits
8 bits
8 bits
Slave Address: Address
of the slave on the
serial interface bus.
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 = 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.
Figure 5. Communication Formats
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