XC908AS60ACFU Motorola Semiconductor Products, XC908AS60ACFU Datasheet - Page 221

• Manufacturer Part Number: XC908AS60ACFU
• Description: MC68HC908AZ60A, MC68HC908AS60A Hcmos Microcontroller Unit Technical Data
• Manufacturer: Motorola Semiconductor Products

Monitor ROM (MON)
Technical Data
221
NOTE:
was not a power-on reset, the security remains bypassed regardless of
the data that the host sends.
If the received bytes do not match the data at locations $FFF6–$FFFD,
the host fails to bypass the security feature. The MCU remains in monitor
mode, but reading FLASH locations returns undefined data, and trying
to execute code from FLASH causes an illegal address reset. After the
host fails to bypass security, any reset other than a power-on reset
causes an endless loop of illegal address resets.
After receiving the eight security bytes from the host, the MCU transmits
a break character signalling that it is ready to receive a command.
The MCU does not transmit a break character until after the host sends
the eight security bytes.
Monitor ROM (MON)
MC68HC908AZ60A — Rev 2.0
MOTOROLA