MC9S08JM16CGTE FREESCALE [Freescale Semiconductor, Inc], MC9S08JM16CGTE Datasheet - Page 58

• Manufacturer Part Number: MC9S08JM16CGTE
• Description: Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Chapter 4 Memory
4.7.5
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.
58
FPS[7:1]
Reset
FPVIOL
FCBEF
FPDIS
FCCF
Field
Field
7:1
0
7
6
5
W
R
FCBEF
Flash Status Register (FSTAT)
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 programmed.
Flash Protection Disable
0 Flash block specified by FPS[7:1] is block protected (program and erase are not allowed).
1 No flash block is protected.
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
programming. The FCBEF bit is cleared by writing a 1 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 may be written to the command buffer.
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.
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.
1
7
= Unimplemented or Reserved
FCCF
1
6
Table 4-11. FPROT Register Field Descriptions
Table 4-12. FSTAT Register Field Descriptions
Figure 4-9. Flash Status Register (FSTAT)
FPVIOL
MC9S08JM16 Series Data Sheet, Rev. 2
0
5
FACCERR
0
4
Description
Description
3
0
0
FBLANK
0
2
Freescale Semiconductor
0
0
1
0
0
0