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參數(shù)資料
| 型號： | PPXY8300A6T1 |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | Pressure Sensor |
| 英文描述： | DIFFERENTIAL, PEIZORESISTIVE PRESSURE SENSOR, RECTANGULAR, SURFACE MOUNT |
| 封裝： | SOIC-20 |
| 文件頁數(shù)： | 157/162頁 |
| 文件大?。?/td> | 4316K |
| 代理商： | PPXY8300A6T1 |
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MPXY8300 Series
Sensors
94
Freescale Semiconductor
Figure 12-10 LFR Sample Timing - Manchester Data Mode (no signal detected during tLFON)
Figure 12-11 LFR Sample Timing - Manchester Data Mode - data error detected
12.5.2
Preamble
The preamble consists of a sequence of Manchester zeros to signal the start of valid information. This preamble must last
a minimum of the 8 Manchester zeros. It is acceptable if the preamble has more than 8 Manchester zeros.
The preamble ends when the incoming signal active pulse width lasts for 1.5 Manchester data bit times. If the number of the
received Manchester zeros during the preamble (until the 1.5 data sync pulse) is less than tPRE(min), then the incoming
signals are ignored, the LFR detector and MFO are turned off and the decoder is reset for a period of time, tRST.
If the correct bits and preamble time are received the LFR detector and the MFO continue to remain powered up to allow the
synchronization period to be decoded.
The LFR decoder has a time-out mechanism that turns off the LFR detector and MFO for tRST when the LFR decoder
receives only Manchester zeros (in preamble) for an extended time, tTIMEOUT, which is defined by counting 65 rising edges
of the LFO clock. The time-out counter will always be enabled when the module is first enabled and will begin after the signal
has been acquired and valid Manchester data coded zeros are received.
12.5.3
Synchronization
In order for the LFR decoder to synchronize to the upcoming wake-up code, a specific pattern of encoded data must be
received during the synchronization interval which lasts a total of nine (9) bit times. If the synchronization pattern fails to
match the correct one, the LFR detector and the MFO are turned off and the LFR decoder is reset for tRST.
If the correct synchronization is decoded the LFR detector and the MFO remain powered up to allow the wake-up code to
be decoded.
LFO
MFO and
are On
tLFON
tLFON = 200 μsec
tSAMPLE
LFR Detector
tRST
LFDO signal
LFO Clock
error in Manchester Datagram
LFR Detector
and MFO
Enables
tRST
tLFON ~ 2msec
signal being acquired
LF signal
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| PPYY12C0.75 | 制造商:Farnell / Pro-Power 功能描述:CABLE YY 12 CORE 0.75MM PER M 制造商:pro-power 功能描述:CABLE, YY, 12 CORE, 0.75MM, PER M 制造商:PRIVATE LABEL 功能描述:CABLE, YY, 12 CORE, 0.75MM, PER M, No. of Conductors:12, Voltage Rating:500V, No 制造商:pro-power 功能描述:CABLE, YY, 12 CORE, 0.75MM, PER M, No. of Conductors:12, Voltage Rating:500V, No. of Max Strands x Strand Size:-, Conductor Area CSA:0.75mm2, Jacket Colour:Grey, Jacket Material:PVC (Polyvinyl Chloride), External Diameter:9.9mm, |
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| PPYY12C0.75 50M | 制造商:Farnell / Pro-Power 功能描述:CABLE YY 12 CORE 0.75MM 50M 制造商:pro-power 功能描述:CABLE, YY, 12 CORE, 0.75MM, 50M |
| PPYY12C1.50 | 制造商:Farnell / Pro-Power 功能描述:CABLE YY 12 CORE 1.5MM PER M 制造商:pro-power 功能描述:CABLE, YY, 12 CORE, 1.5MM, PER M |
| PPYY12C1.50 50M | 制造商:Farnell / Pro-Power 功能描述:CABLE YY 12 CORE 1.5MM 50M 制造商:pro-power 功能描述:CABLE, YY, 12 CORE, 1.5MM, 50M |
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