Motorola M68EVB912B32, User Manual

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OPERATION
68EVB912B32UM/D 3-25
FBULK Erase Target Flash
EEPROM
FBULK
syntax:
FBULK
The FBULK command is used to erase the entire contents of the target MCU’s on-chip Flash
EEPROM in a single operation. After the bulk erase operation has been performed, each on-chip
Flash location is verified. If the contents are not $FF, an error message is displayed.
The target processor’s Flash EEPROM is erased by resetting the target processor and then
loading a small driver program into the target processor’s on-chip RAM. For this reason, the
previous contents of the target processor’s on-chip RAM are lost.
restrictions:
When operating in the EVB mode, the FBULK command cannot be used. If the FBULK
command is entered while in EVB mode, an error message is displayed and command execution
is terminated.
Before using the FBULK command, a target device must have been selected with the DEVICE
command that reflects the locations of the target’s on-chip Flash EEPROM, on-chip RAM, and
the I/O registers when the part is reset. Failure to follow this restriction will cause the FBULK
command to fail and may require that the EVB be reset.
Flash EEPROM programming voltage (Vpp) must be applied to the target MCU. If the target
system is another M68EVB912B32 board, Vpp may be supplied via header W8, with header W7
set accordingly. For more information on these EVB headers, see Table 4-1.
Because the FBULK command downloads a small "driver" program into the target MCU's on-
chip RAM, D-Bug12's breakpoint table is cleared before beginning execution of the "driver".
This is necessary to prevent previously-set breakpoints from accidentally halting the execution of
the driver program.