Microcontroller User's Manual

6-16 MCF5282 User’s Manual MOTOROLA
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6.3.4.8 CFM Command Register (CFMCMD)
The CFMCMD is the register to which Flash program, erase, and verify commands are
written.
CFMCMD is readable and writable in all modes. Writes to bit 7 have no effect and reads
return 0.
2 BLANK Erase Verified Flag. The BLANK flag indicates that the erase verify command (RDARY1)
has checked the two interleaved Flash physical blocks selected by BKSL[1:0] and found
them to be blank. Clear BLANK by writing it to 1. Writing a 0 has no effect.
1 Flash physical blocks verify as erased.
0 If an erase verify command has been requested, and the CCIF flag is set, then the selected
Flash physical blocks are not blank.
1–0 — Reserved, should be cleared.
76 0
Field — CMD
Reset 0000_0000
R/W R/W
Address IPSBAR + 0x1D_0024
Figure 6-12. CFM Command Register (CFMCMD)
Table 6-11. CFMCMD Field Descriptions
Bits Name Description
7 — Reserved, should be cleared.
6–0 CMD[6:0] Command. Valid Flash user mode commands are shown in Table 6-12. Writing a command
in user mode other than those listed in Table 6-12 will set the ACCERR flag in CFMUSTAT.
Table 6-12. CFMCMD User Mode Commands
Command Name Description
0x05 RDARY1 Erase verify (all 1s)
0x20 PGM Longword program
0x40 PGERS Page erase
0x41 MASERS Mass erase
0x06 PGERSVER Page erase verify
Table 6-10. CFMUSTAT Field Descriptions
Bits Name Description