MC68HC08AS20 Datasheet, PDF (159/386 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

12.4.5 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 64-Kbyte memory map.
Table 12-3. 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
ECHO
READ
READ
ADDR. HIGH ADDR. HIGH ADDR. LOW ADDR. LOW
DATA
RESULT
MC68HC08AS20 — Rev. 4.1
Freescale Semiconductor
Advance Information
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