MC68HC711K4CFN4 Datasheet, PDF (26/80 Pages) Motorola, Inc – 8-Bit Microcontroller

• Output $FF on SCI transmitter.
• Erase EEPROM array.
• Verify that EEPROM has been erased. If it has not, repeat erase procedure.
• Write $FF to every location in RAM.
• Check EPROM for data. If data is present, stay in loop. Otherwise proceed.
• Erase the CONFIG register.
• Continue executing bootloader routine.
Notice that the bootloader routine checks the EPROM to see if it contains any data. The presence of
data causes the routine to stay in a loop. At this time, devices with the security enhancement are only
available as one-time-programmable (OTP) MCUs in non-windowed packages. Once they have been
programmed and secured, they will not function in bootstrap mode.
For more information refer to M68HC11 Reference Manual (M68HC11RM/AD).
MOTOROLA
26
M68HC11 K Series
MC6HC11KTS/D