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): 83/162頁
文件大?。?/td> 4316K
代理商: PPXY8300A6T1
MPXY8300 Series
Sensors
Freescale Semiconductor
27
Figure 4-8 FLASH Protection Register (FPROT)
4.8.5
FLASH Status Register (FSTAT)
Bits 3, 1, and 0 always read 0 and writes have no meaning or effect. The remaining five bits are status bits that can be read at
any time. Writes to these bits have special meanings that are discussed in the bit descriptions.
7
6
5
4
3
2
1
0
R
FPS7
FPS6
FPS5
FPS4
FPS3
FPS2
FPS1
FPDIS
W
((1))
NOTES:
1. Background commands can be used to change the contents of these bits in FPROT.
(1)
Reset:
This register is loaded from nonvolatile location NVPROT during reset.
Table 4-10 FPROT Register Field Descriptions
Field
Description
7:1
FPS[7:1]
FLASH Protect Select Bits — When FPDIS = 0, this 7-bit field determines the ending address of unprotected
FLASH locations at the high address end of the FLASH. Protected FLASH locations cannot be erased or pro-
grammed.
0
FPDIS
FLASH Protection Disable
0
FLASH block specified by FPS[7:1] is block protected (program and erase not allowed)
1
No FLASH block is protected
7
6
5
4
3
2
1
0
R
FCBEF
FCCF
FPVIOL
FACCERR
0
FBLANK
0
W
Reset:
1
0
= Unimplemented or Reserved
Figure 4-9 FLASH Status Register (FSTAT)
Table 4-11 FSTAT Register Field Descriptions
Field
Description
7
FCBEF
FLASH Command Buffer Empty Flag — The FCBEF bit is used to launch commands. It also indicates that
the command buffer is empty so that a new command sequence can be executed when performing burst pro-
gramming. The FCBEF bit is cleared by writing a one to it or when a burst program command is transferred to
the array for programming. Only burst program commands can be buffered.
0
Command buffer is full (not ready for additional commands)
1
A new burst program command can be written to the command buffer
6
FCCF
FLASH Command Complete Flag — FCCF is set automatically when the command buffer is empty and no
command is being processed. FCCF is cleared automatically when a new command is started (by writing 1 to
FCBEF to register a command). Writing to FCCF has no meaning or effect.
0
Command in progress
1
All commands complete
5
FPVIOL
Protection Violation Flag — FPVIOL is set automatically when FCBEF is cleared to register a command that
attempts to erase or program a location in a protected block (the erroneous command is ignored). FPVIOL is
cleared by writing a 1 to FPVIOL.
0
No protection violation
1
An attempt was made to erase or program a protected location
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