mc9s12xd256 Freescale Semiconductor, Inc, mc9s12xd256 Datasheet - Page 1123

• Manufacturer Part Number: mc9s12xd256
• Description: Hcs12x Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

27.3.2.7
The FCMD register is the Flash command register.
All CMDB bits are readable and writable during a command write sequence while bit 7 reads 0 and is not
writable.
27.3.2.8
The FCTL register is the Flash control register.
All bits in the FCTL register are readable but are not writable.
Freescale Semiconductor
CMDB[6:0]
Reset
Reset
Field
6-0
W
W
R
R
Flash Command — Valid Flash commands are shown in
listed in
NV7
Flash Command Register (FCMD)
Flash Control Register (FCTL)
F
0
1
7
7
Table 27-18
= Unimplemented or Reserved
= Unimplemented or Reserved
NV6
1
F
6
6
Figure 27-14. Flash Command Register (FCMD)
sets the ACCERR flag in the FSTAT register.
Figure 27-15. Flash Control Register (FCTL)
Table 27-18. Valid Flash Command List
Table 27-17. FCMD Field Descriptions
CMDB[6:0]
MC9S12XDP512 Data Sheet, Rev. 2.17
0x05
0x06
0x20
0x40
0x41
0x47
NV5
F
0
5
5
NV4
0
F
4
4
Sector Erase Abort
Description
NVM Command
Data Compress
Word Program
Sector Erase
Erase Verify
Mass Erase
CMDB
Table
NV3
Chapter 27 512 Kbyte Flash Module (S12XFTX512K4V2)
F
0
3
3
27-18. Writing any command other than those
NV2
0
F
2
2
NV1
F
0
1
1
NV0
0
F
0
0
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