參數(shù)資料
型號(hào): 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(yè)數(shù): 8/162頁(yè)
文件大?。?/td> 4316K
代理商: PPXY8300A6T1
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MPXY8300 Series
Sensors
Freescale Semiconductor
105
Figure 12-22 Carrier Detect Mode Example Timeline
The interrupt service routine should disable the LFR module and clear the LFCF flag. Failure to disable the module may result in
another interrupt occurring prior to the two second transmission subsiding. Other activities can be initiated inside the interrupt
subroutine as dictated by the specific application.
12.9
Alternate Use of LFR Inputs
If the LFR input is not being used the associated pins default to standard MCU I/O port pins which can be configured as:
High impedance digital inputs with optional pull-up devices
Output digital drivers
Refer to the Section 6 for more details on how to configure and use these pins as I/O port pins.
NOTE
In all cases when using the LFR pins as general purpose inputs there will be a resistive load to VSS of
approximately 500 kohm. It is also recommended to keep the LFEN bit reset to ‘0’ if using the LFR pins as general
I/O.
CARRIER TIME
2 sec
SAMPLE TIME
1024 ms
LF ON TIME
200
μs
MODE
CARRIER
DETECT
TIME
2 sec
SAMPLE
ANALOG OUT
DIGITAL OUT
1024 ms
60–70
μs delay
ANALOG ON
128
μs SAMPLE TIME
60–70
μs delay
128
μs SAMPLE TIME
60–70
μs delay
LFI INTERRUPT
88
μs
TRANSMITTER ON
#1
#2
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