mc9s08ac32 Freescale Semiconductor, Inc, mc9s08ac32 Datasheet - Page 62

• Manufacturer Part Number: mc9s08ac32
• Description: Hcs08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Chapter 4 Memory
4.6.6
Only five command codes are recognized in normal user modes as shown in
Section 4.4.3, “Program and Erase Command
programming and erase operations.
62
FACCERR
FBLANK
FPVIOL
Reset
FCBEF
FCCF
Field
7
6
5
4
2
W
R
FCMD7
FLASH Command Register (FCMD)
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
0
0
7
completely erased.
completely erased (all $FF).
FCMD6
0
0
6
Figure 4-9. FLASH Command Register (FCMD)
Table 4-11. FSTAT Field Descriptions
MC9S08AC60 Series Data Sheet, Rev. 2
FCMD5
0
0
5
Execution”
FCMD4
0
0
4
Description
for a detailed discussion of FLASH
FCMD3
3
0
0
Section 4.4.5, “Access
FCMD2
0
0
2
Table
4-13. Refer to
Freescale Semiconductor
FCMD1
0
0
1
Errors.” FACCERR
FCMD0
0
0
0