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參數(shù)資料
| 型號： | RE46C180S16TF |
| 廠商： | Microchip Technology |
| 文件頁數(shù)： | 22/58頁 |
| 文件大小： | 851K |
| 描述： | IC ION SMOKE DETECT ASIC 16SOIC |
| 標(biāo)準(zhǔn)包裝： | 2,600 |
| 系列： | * |
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RE46C180
DS22275A-page 22
?2011 Microchip Technology Inc.
4.3
Serial Read/Write Calibration
As an alternative to the steps in Section 4.2, Smoke
Calibration, the sensitivity settings can be entered
directly from a Serial Read/Write Calibration mode (if
the system has been well characterized).
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 10 clock pulses to the T2 input (V
DD
to
V
SS
and back to V
DD
) to enter in TM10 mode.
This enables the Serial Read/Write Calibration
mode.
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 17 bits have been entered, pulse IO to
store into the EEPROM memory.
5 bit
Standby Sensitivity (LSB first)
3 bit
Hysteresis (LSB first)
4 bit
HUSH Sensitivity (LSB first)
5 bit
CHAMBER voltage in PTT/Chamber
Test (LSB first)
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