MC9S08GT16A Datasheet, PDF (60/300 Pages) Freescale Semiconductor, Inc – Microcontrollers

Memory
Table 4-11. FSTAT Field Descriptions (continued)
Field
Description
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.
4
FACCERR
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 Section 4.4.5, “Access Errors.” FACCERR
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.
2
FBLANK
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
completely erased.
1 After a blank check command is completed and FCCF = 1, FBLANK = 1 indicates the FLASH array is
completely erased (all 0xFF).
4.6.6 FLASH Command Register (FCMD)
Only five command codes are recognized in normal user modes as shown in Table 4-13. Refer to
Section 4.4.3, “Program and Erase Command Execution” for a detailed discussion of FLASH
programming and erase operations.
R
W
Reset
7
0
FCMD7
0
6
5
4
3
2
0
0
0
0
0
FCMD6
FCMD5
FCMD4
FCMD3
FCMD2
0
0
0
0
0
Figure 4-10. FLASH Command Register (FCMD)
Table 4-12. FCMD Field Descriptions
Field
Description
7:0
FLASH Command Bits -- See Table 4-13 for a description of FCMD[7:0].
FCMD[7:0]
1
0
FCMD1
0
0
0
FCMD0
0
MC9S08GT16A/GT8A Data Sheet, Rev. 1
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Freescale Semiconductor