MC9S08QD4_07 Datasheet, PDF (51/202 Pages) Freescale Semiconductor, Inc – 8-Bit HCS08 Central Processor Unit (CPU)

Chapter 4 Memory Map and Register Definition
4.7.6 Flash Command Register (FCMD)
Only five command codes are recognized in normal user modes as shown in Table 4-13. Refer to
Section 4.5.3, “Program and Erase Command Execution,” for a detailed discussion of flash programming
and erase operations.
7
6
5
4
3
2
1
0
R
0
0
0
0
0
0
0
0
W
FCMD
Reset
0
0
0
0
0
0
0
0
= Unimplemented or Reserved
Figure 4-10. Flash Command Register (FCMD)
Table 4-13. Flash Commands
Command
Blank check
Byte program
Byte program — burst mode
Page erase (512 bytes/page)
Mass erase (all flash)
FCMD
0x05
0x20
0x25
0x40
0x41
Equate File Label
mBlank
mByteProg
mBurstProg
mPageErase
mMassErase
All other command codes are illegal and generate an access error.
It is not necessary to perform a blank check command after a mass erase operation. Only blank check is
required as part of the security unlocking mechanism.
MC9S08QD4 Series MCU Data Sheet, Rev. 3
Freescale Semiconductor
51