mc9s12vr48 Freescale Semiconductor, Inc, mc9s12vr48 Datasheet - Page 486
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mc9s12vr48
Manufacturer Part Number
mc9s12vr48
Description
S12 Microcontrollers
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC9S12VR48.pdf
(592 pages)
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64 KByte Flash Module (S12FTMRG64K512V1)
Before launching a command, the ACCERR and FPVIOL bits in the FSTAT register must be clear (see
Section
17.3.2.7) and the CCIF flag should be tested to determine the status of the current command write
sequence. If CCIF is 0, the previous command write sequence is still active, a new command write
sequence cannot be started, and all writes to the FCCOB register are ignored.
17.4.4.2.1
Define FCCOB Contents
The FCCOB parameter fields must be loaded with all required parameters for the Flash command being
executed. Access to the FCCOB parameter fields is controlled via the CCOBIX bits in the FCCOBIX
register (see
Section
17.3.2.3).
The contents of the FCCOB parameter fields are transferred to the Memory Controller when the user clears
the CCIF command completion flag in the FSTAT register (writing 1 clears the CCIF to 0). The CCIF flag
will remain clear until the Flash command has completed. Upon completion, the Memory Controller will
return CCIF to 1 and the FCCOB register will be used to communicate any results. The flow for a generic
command write sequence is shown in
Figure
17-25.
MC9S12VR Family Reference Manual,
Rev. 2.2
486
Freescale Semiconductor
Preliminary - Subject to Change Without Notice
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