?2011 Microchip Technology Inc.
DS22275A-page 15
RE46C180
4.0
USER PROGRAMMING MODES
Tables 4-1 to 4-6 show the parameters for user smoke
calibration.
TABLE 4-1:
PARAMETRIC
PROGRAMMING
Parametric
Programming
Range
Standby Smoke
Sensitivity (V
STD
)
2.9 ?6.0V (Note 1)    100 mV
(Note 1)
Hysteresis (V
HYS
)
+50 ?+225 mV
(Note 2)
25 mV
(Note 2)
HUSH Smoke
Sensitivity (V
HSH
)
-1600 mV?100 mV
(Note 3)
100 mV
(Note 3)
CHAMBER Voltage
at PTT/Chamber
Test (V
CHAMBER
)
2.10 ?6.75V
(Note 4)
150 mV
(Note 4)
Note  1:   V
STD
 listed is based on V
DD
= 9V. The
actual range is (29/90)V
DD
 ?(60/90)V
DD
,
resolution is V
DD
/90.
2:   V
HYS
 is a positive offset from V
STD
. The
listed value is based on V
DD
 = 9V. The
actual range is +(0.5/90)V
DD
 ?
+(2.25/90)V
DD
, resolution is
(0.25/90)V
DD
.
3:   V
HSH
 is a negative offset from V
STD
. The
listed value is based on V
DD
 = 9V. The
actual range is (16/90)V
DD
 ?
(1/90)V
DD
, resolution is V
DD
/90
4:   V
CHAMBER
 listed value is based on
V
DD
= 9V. Actual range is (21/90)V
DD
 ?
(67.5/90)V
DD
, resolution is (1.5/90)V
DD
.
TABLE 4-2:
STANDBY SENSITIVITY (V
STD
)
PROGRAMMING
CONFIGURATION
AT V
DD
= 9V
V
STD
 Register STTR [5:1] Configuration    Values
STTR5  STTR4  STTR3   STTR2   STTR1    V
STD
0
0
0
0
0
4.5V
0
0
0
0
1
4.6V
0
0
0
1
0
4.7V
0
0
0
1
1
4.8V
0
0
1
0
0
4.9V
0
0
1
0
1
5.0V
0
0
1
1
0
5.1V
0
0
1
1
1
5.2V
0
1
0
0
0
5.3V
0
1
0
0
1
5.4V
0
1
0
1
0
5.5V
0
1
0
1
1
5.6V
0
1
1
0
0
5.7V
0
1
1
0
1
5.8V
0
1
1
1
0
5.9V
0
1
1
1
1
6.0V
1
0
0
0
0
2.9V
1
0
0
0
1
3.0V
1
0
0
1
0
3.1V
1
0
0
1
1
3.2V
1
0
1
0
0
3.3V
1
0
1
0
1
3.4V
1
0
1
1
0
3.5V
1
0
1
1
1
3.6V
1
1
0
0
0
3.7V
1
1
0
0
1
3.8V
1
1
0
1
0
3.9V
1
1
0
1
1
4.0V
1
1
1
0
0
4.1V
1
1
1
0
1
4.2V
1
1
1
1
0
4.3V
1
1
1
1
1
4.4V
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