MAX1617 Datasheet, PDF (7/12 Pages) ON Semiconductor – SMBus Temperature Sensor with Internal and External Diode Input

MAX1617
POR*, initialize
all registers
STBY mode ^YES
active?
NO
Stop conv.,
reset
STATUS D[7]
Start internal
conversion
STATUS [D7]
YES
STBY
active?
YES ^NO
STBY
released?
YES
One
shot?
NO
NO
NO
Perform one
conversion
cycle
YES
EOC*?
Update
INT_TEMP
Start external
conversion
NO _Thermal
Trip?
YES
STBY ^YES
active?
NO
YES
Ext. diode
open?
NO
YES
Rest
period
over?
NO
YES
One Shot?
NO
Rest Period
according to
CONV_RATE
register
NO
EOC*?
YES
Update
EXT_TEMP
Thermal ^YES
Trip?
NO _CONFIG
[D7] active?
YES
NO
Reset
STATUS
bit D[7]
Set appropriate
STATUS bit
D[6:2]
Enable
ALERT#
Monitor SMBus
for START
condition
YES
STATUS
read?
Execute
Status read
and clear
STATUS
NO
READ
WRITE
Read/
Write?
Execute
SMBus
read
Execute
SMBus
write
YES
NO
Valid
NO
command?
Address
match?
NO
YES
ARA*?
YES
ALERT
active ?
YES
ARA* bus
arbitration?
Win
NO ^arbitration?
YES
Disable and re–arm
ALERT, send
local address to host
* POR = Power On Reset; ARA = Alert Response Address; EOC = End Of Conversion
Figure 2. MAX1617 Functional Description Flowchart
http://onsemi.com
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