MC68HC08AB16A Datasheet, PDF (155/380 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Freescale Semiconductor, Inc.
Monitor ROM (MON)
Functional Description
10.4.5 Commands
The monitor ROM uses these commands:
• READ, read memory
• WRITE, write memory
• IREAD, indexed read
• IWRITE, indexed write
• READSP, read stack pointer
• RUN, run user program
A sequence of IREAD or IWRITE commands can access a block of
memory sequentially over the full 64k-byte memory map.
Table 10-3. 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
ECHO
READ
ADDRESS ADDRESS ADDRESS ADDRESS
HIGH
HIGH
LOW
LOW
DATA
RETURN
MC68HC08AB16A — Rev. 2.0
MOTOROLA
Monitor ROM (MON)
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Technical Data
155