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
文件頁數(shù): 94/162頁
文件大?。?/td> 4316K
代理商: PPXY8300A6T1
MPXY8300 Series
Sensors
Freescale Semiconductor
37
5.9.4
System Options Register 1 (SOPT1)
SOPT1 is a write-once register so only the first write after reset is honored. Any subsequent attempt to write to SOPT1
(intentionally or unintentionally) is ignored to avoid accidental changes to these sensitive settings. SOPT1 must be written during
the user’s reset initialization program to set the desired controls even if the desired settings are the same as the reset settings.
5.9.5
System Options Register 2 (SOPT2)
SOPT2 is a write-once register so only the first write after reset is honored. Any subsequent attempt to write to SOPT2
(intentionally or unintentionally) is ignored to avoid accidental changes to these sensitive settings. SOPT2 must be written during
the user’s reset initialization program to set the desired controls even if the desired settings are the same as the reset settings.
7
6
5
4
3
2
1
0
R
COPE
COPCLKS
STOPE
1
0
BKGDPE
1
W
Reset:
1
0
1
0
1
= Unimplemented or Reserved
Figure 5-5 System Options Register 1 (SOPT1)
Table 5-7 SOPT1 Register Field Descriptions
Field
Description
7
COPE
COP Watchdog Enable — This write-once bit defaults to 1 after reset.
0
COP watchdog timer disabled
1
COP watchdog timer enabled (force reset on time-out)
6
COPCLKS
COP Clock Selection — This write-once bit selects the clock source of the COP watchdog.
0
Internal 1-kHz clock is sourced to COP
1
Bus clock is sourced to COP
5
STOPE
Stop Mode Enable — This write-once bit defaults to 0 after reset, which disables stop mode. If stop mode is
disabled and a user program attempts to execute a STOP instruction, an illegal opcode reset is forced.
0
Stop mode disabled
1
Stop mode enabled
1
BKGDPE
Background Debug Mode Pin Enable — The BKGDPE bit enables the PTC0/BKGD/MS pin to function as
BKGD/MS. When clear, the pin functions as PTC0, which is an output-only general purpose I/O. This pin
defaults to the BKGD/MS function following an MCU reset.
0
PTC0/BKGD/MS pin functions as PTC0
1
PTC0/BKGD/MS pin functions as BKGD/MS
7
6
5
4
3
2
1
0
R
TRE
COPT[2:0]
LFOSEL
TCLKDIV
BUSCLKS1 BUSCLKS0
W
Reset:
0
1
0
= Unimplemented or Reserved
Figure 5-6 System Options Register 2 (SOPT2)
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