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)： 16/162頁
文件大小： 4316K
代理商： PPXY8300A6T1
MPXY8300 Series
Sensors
112
Freescale Semiconductor
Figure 13-7 Bi-Phase Data Bit Encoding (POL = 1)
Figure 13-8 RF Output Stage Block Diagram
13.5.1
Modulation Protocol
The modulation control bit, MOD, sets the modulation of the RF signal will be either amplitude shift keying (ASK) or frequency
shift keying (FSK) with several options for the frequency shift.
When operating in the FSK mode the internal, fractional-n PLL divider will be used to create the two carrier frequencies for data
zero and data one. This method is more effective and robust than “pulling” the external crystal in order to shift the carrier
frequency.
ASK = fRF
LOW
BIT
HIGH
BIT
Bit Time
Consecutive “0”
Data Bits
Consecutive “1”
Data Bits
LOW
BIT
“001101”
Data Bits
HIGH
BIT
FSK = fRF+ Δf
FSK = fRF - Δf
ASK = OFF
Bit Time
OSCILLATOR
CONTROL
LOGIC
RF
AMP
VCO
DCLK
XI
XO
PHASE
DETECTOR
RF
CTS
RTS
DATA
LOW-PASS
FILTER
FRACT-N
DIVIDER
CF
PWR0:2
MOD
AFREQ0:12
BFREQ0:12
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