mc9s08gt32a Freescale Semiconductor, Inc, mc9s08gt32a Datasheet - Page 60

• Manufacturer Part Number: mc9s08gt32a
• Description: Hcs08 Microcontrollers 8-bit Microcontroller Family
• Manufacturer: Freescale Semiconductor, Inc

Chapter 4 Memory
4.6.5
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.
60
FACCERR
FBLANK
Reset
FPVIOL
FCBEF
FCCF
Field
7
6
5
4
2
W
R
FCBEF
Flash Status Register (FSTAT)
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.
Access Error Flag — FACCERR is set automatically when the proper command sequence is not followed
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
is cleared by writing a 1 to FACCERR. Writing a 0 to FACCERR has no meaning or effect.
0 No access error has occurred.
1 An access error has occurred.
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
1 After a blank check command is completed and FCCF = 1, FBLANK = 1 indicates the flash array is completely
1
7
completely erased.
erased (all 0xFF).
= Unimplemented or Reserved
FCCF
1
6
Figure 4-8. Flash Status Register (FSTAT)
Table 4-12. FSTAT Field Descriptions
FPVIOL
MC9S08GB60A Data Sheet, Rev. 1.02
0
5
FACCERR
0
4
Description
3
0
0
Section 4.4.5, “Access
FBLANK
0
2
Freescale Semiconductor
0
0
1
Errors.” FACCERR
0
0
0