參數(shù)資料
型號: RE46C180S16TF
廠商: Microchip Technology
文件頁數(shù): 30/58頁
文件大小: 851K
描述: IC ION SMOKE DETECT ASIC 16SOIC
標(biāo)準(zhǔn)包裝: 2,600
系列: *
RE46C180
DS22275A-page 30
?2011 Microchip Technology Inc.
4.6
Serial Read/Write Calibration and
User Features
As an alternative to the steps in Section 4.2, Smoke
Calibration  and  Section 4.4, User Feature Selec-
tions, the sensitivity settings and user feature selec-
tions can be entered directly from a Serial Read/Write
Calibration mode.
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 18 clock pulses to the T2 input (V
DD
 to
V
SS
  and then back to V
DD
) to enter in TM18
mode.   This   enables the   Serial Read/Write
Calibration and User Features modes.
5.   TEST now acts as a data input (High = V
DD
,
Low = V
SS
). FEED acts as the clock input
(High = V
DD
, Low = V
SS
). Clock in the sensitivity
settings. The data sequence should be as
follows:
6.   After all 35 bits have been entered, pulse IO to
store into the EEPROM memory.
 
D1 ~ D18
User Features (18 bits, LSB first)
D19 ~ D35
Calibration (17 bits, LSB First)
REGISTER 4-3:
SERIAL READ/WRITE REGISTER
W-x
W-x
W-x
PTTR5
PTTR4
PTTR3
bit 35
bit 33
W-x
W-x
W-x
W-x
W-x
W-x
W-x
W-x
PTTR2
PTTR1
TMTR4
TMTR3
TMTR2
TMTR1
HYTR3
HYTR2
bit 32
bit 25
W-x
W-x
W-x
W-x
W-x
W-x
U
W-x
HYTR1
STTR5
STTR4
STTR3
STTR2
STTR1

LBTR2
bit 24
bit 17
W-x
W-x
W-x
W-x
W-x
W-x
W-x
W-x
LBTR1
EOLEn
COEn
NoAAL
SyncEn
LBHshEn
AMHCEn
AMLEDEn
bit 16
bit 8
W-x
W-x
W-x
W-x
W-x
W-x
W-x
W-x
AMTO2
AMTO1
AMEn
ShrTO
SmrtH
HIAO
HushEnB
TSEL
bit 8
bit 1
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as 0
-n = Value at POR
1 = Bit is set
0 = Bit is cleared
x = Bit is unknown
bit 35
PTTR5: MSB (See Table 4-5)
bit 34
PTTR4: 4SB
bit 33
PTTR3: 3SB
bit 32
PTTR2: 2SB
bit 31
PTTR1: LSB
bit 30
TMTR4: MSB (See Table 4-4)
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