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)： 84/162頁
文件大?。?/td> 4316K
代理商： PPXY8300A6T1
MPXY8300 Series
Sensors
28
Freescale Semiconductor
4.8.6
FLASH Command Register (FCMD)
Only five command codes are recognized in normal user modes as shown in Table 4-12. Refer to Section 4.6.3, for a detailed
discussion of FLASH programming and erase operations.
All other command codes are illegal and generate an access error.
It is not necessary to perform a blank check command after a mass erase operation. Only blank check is required as part of the
security unlocking mechanism.
4
FACCERR
Access Error Flag — FACCERR is set automatically when the proper command sequence is not obeyed
exactly (the erroneous command is ignored), if a program or erase operation is attempted before the FCDIV
register has been initialized, or if the MCU enters stop while a command was in progress. For a more detailed
discussion of the exact actions that are considered access errors, see Section 4.6.5. FACCERR is cleared by
writing a 1 to FACCERR. Writing a 0 to FACCERR has no meaning or effect.
0
No access error
1
An access error has occurred
2
FBLANK
FLASH Verified as All Blank (erased) Flag — FBLANK is set automatically at the conclusion of a blank check
command if the entire FLASH array was verified to be erased. FBLANK is cleared by clearing FCBEF to write a
new valid command. Writing to FBLANK has no meaning or effect.
0
After a blank check command is completed and FCCF = 1, FBLANK = 0 indicates the FLASH array is not
completely erased
1
After a blank check command is completed and FCCF = 1, FBLANK = 1 indicates the FLASH array is com-
pletely erased (all 0xFF)
7
6
5
4
3
2
1
0
R
0
W
FCMD7
FCMD6
FCMD5
FCMD4
FCMD3
FCMD2
FCMD1
FCMD0
Reset:
0
Figure 4-10 FLASH Command Register (FCMD)
Table 4-12 FLASH Commands
Command
FCMD
Equate File Label
Blank check
0x05
mBlank
Byte program
0x20
mByteProg
Byte program — burst mode
0x25
mBurstProg
Page erase (512 bytes/page)
0x40
mPageErase
Mass erase (all FLASH)
0x41
mMassErase
Table 4-11 FSTAT Register Field Descriptions (Continued)
Field
Description
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