MC68HC08AZ32A Datasheet, PDF (161/456 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Freescale Semiconductor, Inc.
Monitor ROM (MON)
Functional description
11.4.4.1 Commands
The monitor ROM uses the following commands:
• READ (read memory)
• WRITE (write memory)
• IREAD (indexed read)
• IWRITE (indexed write)
• READSP (read stack pointer)
• RUN (run user program)
Table 11-3. READ (Read Memory) Command
Description
Read byte from memory
Operand
Specifies 2-byte address in high byte:low byte order
Data returned Returns contents of specified address
Opcode
$4A
Command sequence
SENT TO
MONITOR
READ
READ ADDR. HIGH ADDR. HIGH ADDR. LOW ADDR. LOW
DATA
ECHO
RESULT
Table 11-4. WRITE (Write Memory) Command
Description
Write byte to memory
Operand
Specifies 2-byte address in high byte:low byte order; low byte followed by data byte
Data returned None
Opcode
$49
Command sequence
SENT TO
MONITOR
WRITE
WRITE ADDR. HIGH ADDR. HIGH ADDR. LOW ADDR. LOW
DATA
DATA
ECHO
MC68HC08AZ32A — Rev 1.0
MOTOROLA
Monitor ROM (MON)
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Technical Data
161