MC9S12T64 Datasheet, PDF (246/608 Pages) Motorola, Inc – Specification

CALRAM 2K
Freescale Semiconductor, Inc.
4. Set FSUM in the register CALCFG.
After calibration is done, the FSUM bit is written to erase and to program
the Flash EEPROM. Setting the FSUM bit enables the flash super user
mode and the FADDR (FADDRHI and FADDRLO) and FDATA
(FDATAHI and FDATALO) registers become visible in the memory map.
Erase/program sequences in the flash super user mode must be used,
since writing calibration data area only causes the CALRAM array to be
written. See the erase/program sequence in the flash super user mode
in page 229.
Note that during erasing/programming a Flash EEPROM block, the data
contained into the correspondent block cannot be read regardless if it is
been overlapped by the CALRAM or not.
$0000
Remaining Flash EEPROM cannot
be correctly read during erasing or
programming
$8000
2K bytes
CALRAM
Flash EEPROM
Block 1
Flash EEPROM
Block 0
$FFFF
MCU Control program is running from
this block
Figure 35 An Example Memory Map When Erase/Program Flash EEPROM
5. Erase data in the Flash EEPROM.
MC9S12T64Revision 1.1.1
CALRAM 2K
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