TCM1617 Datasheet, PDF (7/14 Pages) Microchip Technology – SMBus Thermal Sensor with External Diode Input

SMBus Thermal Sensor with External Diode Input
TCM1617
POR, initialize
all registers
STBY mode YES
active?
NO
Stop conv., reset
STATUS D[7]
Start internal
conversion,
STATUS [D7]
STBY
active?
YES
YES
NO
NO
STBY
released?
One
YES
shot?
NO
Perform one
conversion cycle
NO
YES
EOC?
Update
INT_TEMP
Start external
conversion
NO _{Thermal Trip?}
YES
STBY
YES
active?
NO
Ext. diode YES
open?
NO
YES
Rest
period over?
NO
NO
EOC?
YES
YES
One Shot?
Update
EXT_TEMP
NO
Rest Period
according to
CONV_RATE
register
YES
Thermal Trip?
NO
NO
CONFIG
[D7] active?
YES
Reset STATUS
bit D[7]
Set appropriate
STATUS bit
D[6:2]
Enable
ALERT#
Monitor SMBus
for START
condition
Execute
STATUS ^{YES STATUS read and}
read?
clear STATUS
NO
READ
Execute SMBus
read
Read/
Write?
WRITE
Execute SMBus
write
NO
NO
Address
match?
YES
YES
Valid
command?
NO
ARA?
YES
NO
ALERT#
active?
YES
ARA bus
arbitration
Win
NO ^arbitration?
YES
Disable and re-arm
ALERT#, send
local address to host
 2001 Microchip Technology Inc. DS21485A
Figure 2. TCM1617 Functional Description Flowchart
7
TCM1617-1 2/5/99