Rainbow Electronics MAX6683 - Manual (Page 10)

MAX6683
Temperature Sensor and System Monitor
in a 10-Pin µMAX
10 ______________________________________________________________________________________
INTERRUPT
STATUS READ
T HOT
T HYST
TEMPERATURE
MONITORING CYCLE
DEFAULT MODE
ONE-TIME
INTERRUPT MODE
COMPARATOR MODE
ALERT
ALERT
ALERT
Figure 1. Alert Response to Temperature Interrupts
W/R
W/R
W/R
W/R
W/R
W/R
Write Byte Format
Read Byte Format
Send Byte Format Receive Byte Format
Slave Address: equiva-
lent to chip-select line of
a 3-wire interface Command Byte: selects which
register you are writing to Data Byte: data goes into the register
set by the co mma nd byte ( to se t
thresholds, configuration masks, and
sampling rate)
Slave Address: equiva-
lent to chip-select line of
a 3-wire interface Command Byte: selects
which register you are
reading from Slave Address: repeated
due to change in data-
flow direction Data Byte: reads from
the register set by the
command byte
Data Byte: writes data to the
register commanded by the
last Read Byte or Write Byte
transmission Data Byte: reads data from
the register commanded
by the last Read Byte or
Write Byte transmission;
also used for SMBus alert
Response return address
S = Start condition
P = Stop condition Shaded = Slave transmission
A = Not acknowledged
ACK
7 bits
ADDRESS ACK
8 bits
DATA ACK P
8 bits
S COMMAND W/R
ACK
7 bits
ADDRESS ACK S ACK
8 bits
DATA
7 bits
ADDRESS
8 bits
P S COMMAND A
Read Word Format
ACK
7 bits
ADDRESS ACK S ACK ACK
8 bits
DATA_LOW_byte
8 bits
DATA_HIGH_byte
7 bits
ADDRESS
8 bits
S COMMAND A
ACK
7 bits
ADDRESS
8 bits
COMMAND ACK P S ACK
7 bits
ADDRESS
8 bits
DATA P S A
0
0
0
0 1
1
1
P
Figure 2. SMBus Protocols