參數(shù)資料
型號: RE46C180S16TF
廠商: Microchip Technology
文件頁數(shù): 34/58頁
文件大?。?/td> 851K
描述: IC ION SMOKE DETECT ASIC 16SOIC
標(biāo)準(zhǔn)包裝: 2,600
系列: *
RE46C180
DS22275A-page 34
?2011 Microchip Technology Inc.
4.7
Horn Test
Test mode TM3 allows the horn to be enabled
indefinitely for audibility testing.
To enter this mode, follow the next 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 three clock pulses to the T2 input (V
DD
 to
V
SS
  and then back to V
DD
) to enter in TM3
mode.
5.    Drive TEST from V
DD
 to V
SS
 to enable the horn.
FIGURE 4-7:
Timing Diagram for Horn Test in Mode TM3.
V
DD
Horn Enabled
TEST
V
SS
Min T1 = 20 祍
V
DD
T2
V
SS
Min TSETUP1 = 10 祍
Min PW1 = 10 祍
MODE
M0
TM0
TM1
TM2
TM3
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