參數(shù)資料
型號: RE46C180S16TF
廠商: Microchip Technology
文件頁數(shù): 35/58頁
文件大?。?/td> 851K
描述: IC ION SMOKE DETECT ASIC 16SOIC
標(biāo)準(zhǔn)包裝: 2,600
系列: *
?2011 Microchip Technology Inc.
DS22275A-page 35
RE46C180
4.8
Low Battery Test
Test mode TM17 allows the low battery trip point to be
tested. To enter this mode, follow these steps:
1.    Power up with the bias condition shown in
Figure 4-1 to enter M0. At power-up: 
TEST = IO = FEED = T2 = V
SS
,
DETECT = V
DD
.
2.    Drive T2 input from V
SS
 to V
DD
 and hold at V
DD
to enter TM0.
3.    Drive TEST from V
SS
 to V
DD
 and hold at V
DD
.
4.    Apply 17 clock pulses to the T2 input (V
DD
 to
V
SS
  and then back to V
DD
) to enter in TM17
mode.
5.    Drive IO from V
SS
  to V
DD
  to enable the low
battery testing and turn on the RLED. Sweep
V
DD
  from high to low and monitor TESTOUT
output. The TESTOUT output will indicate the
Low    Battery    status    (High = Low    Battery
detected).
FIGURE 4-8:
Timing Diagram for Low Battery Test in Mode TM17.
VDD
TEST
VSS
VDD
T2
VSS
Min TSETUP1 = 1
Min TPW1 = 1
Min T1 = 2
VDD
IO
VSS
9V
V
DD
7.5V
6V
VDD
ESTOUT
VSS
MODE
M0
TM0
TM1
TM2
TM3
TM4
TM5
TM6
TM17
Note: Assume the 7.5V low battery trip point is selected.
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