MC9S08QG8_09 Datasheet, PDF (59/314 Pages) Freescale Semiconductor, Inc – HCS08 Microcontrollers

Chapter 4 Memory Map and Register Definition
Field
7:1
FPS
0
FPDIS
Table 4-11. FPROT Register Field Descriptions
Description
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 FPS7:FPS1 is block protected (program or erase not allowed).
1 No FLASH block is protected.
4.7.5 FLASH Status Register (FSTAT)
7
6
5
4
3
2
1
0
R
FCCF
0
FBLANK
0
0
FCBEF
FPVIOL FACCERR
W
Reset
1
1
0
0
0
0
0
0
= Unimplemented or Reserved
Figure 4-9. FLASH Status Register (FSTAT)
Table 4-12. FSTAT Register Field Descriptions
Field
7
FCBEF
6
FCCF
5
FPVIOL
Description
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 can 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.
MC9S08QG8 and MC9S08QG4 Data Sheet, Rev. 5
Freescale Semiconductor
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