S912XHZ512F1VAG Datasheet, PDF (147/978 Pages) Freescale Semiconductor, Inc – Covers MC9S12XHZ384, MC9S12XHZ256

Chapter 3 512 Kbyte Flash Module (S12XFTX512K4V3)
3.3.2.7 Flash Command Register (FCMD)
The FCMD register is the Flash command register.
Module Base + 0x0006
7
6
5
4
3
2
1
0
R
0
W
CMDB
Reset
1
1
0
0
0
0
0
0
= Unimplemented or Reserved
Figure 3-14. Flash Command Register (FCMD)
All CMDB bits are readable and writable during a command write sequence while bit 7 reads 0 and is not
writable.
Table 3-16. FCMD Field Descriptions
Field
Description
6:0
Flash Command — Valid Flash commands are shown in Table 3-17. Writing any command other than those
CMDB[6:0] listed in Table 3-17 sets the ACCERR flag in the FSTAT register.
Table 3-17. Valid Flash Command List
CMDB[6:0]
0x05
0x06
0x20
0x40
0x41
0x47
NVM Command
Erase Verify
Data Compress
Word Program
Sector Erase
Mass Erase
Sector Erase Abort
3.3.2.8 Flash Control Register (FCTL)
The FCTL register is the Flash control register.
Module Base + 0x0007
7
R
0
6
NV6
5
NV5
4
NV4
3
NV3
2
NV2
1
NV1
0
NV0
W
Reset
0
F
F
F
F
F
F
F
= Unimplemented or Reserved
Figure 3-15. Flash Control Register (FCTL)
All bits in the FCTL register are readable but are not writable.
MC9S12XHZ512 Data Sheet, Rev. 1.06
Freescale Semiconductor
147