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)： 78/162頁
文件大?。?/td> 4316K
代理商： PPXY8300A6T1
MPXY8300 Series
Sensors
22
Freescale Semiconductor
Figure 4-3 FLASH Burst Program Flowchart
4.6.5
Access Errors
An access error occurs whenever the command execution protocol is violated.
Any of the following specific actions will cause the access error flag (FACCERR) in FSTAT to be set. FACCERR must be cleared
by writing a 1 to FACCERR in FSTAT before any command can be processed.
Writing to a FLASH address before the internal FLASH clock frequency has been set by writing to the FCDIV register
Writing to a FLASH address while FCBEF is not set (A new command cannot be started until the command buffer is
empty.)
Writing a second time to a FLASH address before launching the previous command (There is only one write to FLASH
for every command.)
Writing a second time to FCMD before launching the previous command (There is only one write to FCMD for every
command.)
Writing to any FLASH control register other than FCMD after writing to a FLASH address
Writing any command code other than the five allowed codes (0x05, 0x20, 0x25, 0x40, or 0x41) to FCMD
Accessing (read or write) any FLASH control register other than the write to FSTAT (to clear FCBEF and launch the
command) after writing the command to FCMD.
The MCU enters stop mode while a program or erase command is in progress (The command is aborted.)
1
0
FCBEF?
START
WRITE TO FLASH
TO BUFFER ADDRESS AND DATA
WRITE COMMAND ($25) TO FCMD
NO
YES
FPVIO OR
WRITE 1 TO FCBEF
TO LAUNCH COMMAND
AND CLEAR FCBEF (Note 2)
NO
YES
NEW BURST COMMAND?
1
0
FCCF?
ERROR EXIT
DONE
Note 2: Wait at least four bus cycles before
1
0
FACCERR?
CLEAR ERROR
FACCERR?
Note 1: Required only once after reset.
WRITE TO FCDIV (Note 1)
checking FCBEF or FCCF.
FLASH BURST
PROGRAM FLOW
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