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Reference Documentation
Reference documents are provided on the support CD in Acrobat Reader format.
Monitor Commands – HCS12 Serial Monitor application note.
9S12C32 manual – 9S12C32 user manuals
CPU12RM – HCS12 core user manual with instruction set
M68EVB912C32_SCH_C.pdf – M68EVB912C32 board schematics
DEBUG MONITOR OPERATION
See the Monitor commands application note on the monitor for complete details of operation.
Basic operation is provided in this manual. The monitor occupies 2K bytes of flash memory
and about to 50 bytes of stack space. It provides a binary command set via the HC12 SCI port
and COM1 connection. Monitor operation provides a 24Mhz bus or E clock frequency by
default with an 8Mhz reference frequency input.
COMMUNICATION:
The monitor provides 115.2K baud serial communication on the SCI1 interface port. Monitor
applies the SCI Interrupt service in the HC12 device.
POWER ON or RESET PROMPT:
The monitor will provide a binary prompt to the EVB board serial COM1 port.
COMMANDS:
No user commands can be applied with a keyboard with software such as HyperTerminal or
AxIDE. The monitor commands are binary and not compatible with keyboard (ASCII) entry or
display. Host based software should interface with the monitor on the serial communication
port to provide development support.
INTERRUPT SERVICE SUPPORT:
The monitor provides vector relocation in the 9S12C32 flash so user interrupt vectors appear
from 0xF780 to 0xF7FF memory space. User will not have access to the SCI, SWI, and
RESET vectors while the monitor is operating. Programming the user Reset vector will cause
the monitor to execute the user program on Reset. Interrupt and Reset vectors are remapped
from 0xFF80 – 0xFFFF to the 0xF780 – 0xF7FF memory range on a one to one basis for user
application access.
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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