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SMD1103P View Datasheet(PDF) - Summit Microelectronics

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SMD1103P Datasheet PDF : 14 Pages
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SMD1102 / 1103 / 1113
Once the SMBALERT# signal has been asserted it must be
reset before further communication with the device, with
the exception of the SMBALERT# response sequence.
Resetting the SMBALERT# is accomplished by performing
a read operation.
Figure 10 shows the SMBALERT# signal being reset by a
Read operation.
Note: a Read operation that is used to reset the
SMBALERT# will not return valid data.
Solid line
indicates
alert set if
conv = limit
Dashed line
indicates
alert NOT set
if conv = limit
Upper limit
Lower limit
3FF
ALERT
REGION
ALERT
REGION
000
"00"
3FF
ALERT
REGION
3FF
ALERT
REGION
ALERT
REGION
"01"
ALERT
REGION
000
Monitor
Option Bits
3FF x x
Lower
Upper
000
"10"
000
"11"
Figure 8. Four Alert Conditions
2033 Fig08
SMBALERT#
SCL
SDA
0 0 0 1 1 0 0 R/M
1 0 0 1 0 CH1 CH0
S
A
NS
T
C
AT
A
R
T
Alert Response
Address
K
Device Type
Identifier
Offending Channel
Address
C
K
O
P
2033 Fig09
Figure 9. SMBALERT# Response Sequence
SMBALERT#
SCL
SDA
1 0 0 1 0 CH1 CH0 R/M
S
A
T
C
A
K
R
T
Figure 10. Resetting SMBALERT#
SUMMIT MICROELECTRONICS, Inc.
2033 8.1 10/04/01
NS
AT
CO
KP
2033 Fig10
9
 

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