MC68HC908AZ32ACFU MOTOROLA [Motorola, Inc], MC68HC908AZ32ACFU Datasheet - Page 176

• Manufacturer Part Number: MC68HC908AZ32ACFU
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

Monitor ROM (MON)
12.4 Functional Description
Advance Information
176
Monitor ROM receives and executes commands from a host computer.
Figure 12-1
communicate with a host computer via a standard RS-232 interface.
While simple monitor commands can access any memory address, the
68HC908AZ32A has a FLASH security feature to prevent external
viewing of the contents of FLASH. Proper procedures must be followed
to verify FLASH content. Access to the FLASH is denied to unauthorized
users of customer specified software (see
In monitor mode, the MCU can execute host-computer code in RAM
while all MCU pins except PTA0 retain normal operating mode functions.
All communication between the host computer and the MCU is through
the PTA0 pin. A level-shifting and multiplexing interface is required
between PTA0 and the host computer. PTA0 is used in a wired-OR
configuration and requires a pullup resistor.
Freescale Semiconductor, Inc.
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For More Information On This Product,
Up to 28.8 kBaud Communication with Host Computer
Execution of Code in RAM or FLASH
FLASH Security
FLASH Programming
shows a sample circuit used to enter monitor mode and
Go to: www.freescale.com
Monitor ROM (MON)
Security
68HC908AZ32A — Rev 0.0
on page 185).
MOTOROLA