MC68HC908LD64 Datasheet, PDF (144/362 Pages) Freescale Semiconductor, Inc – Microcontrollers

Monitor ROM (MON)
MISSING STOP BIT
TWO-STOP-BIT DELAY BEFORE ZERO ECHO
01234567
01234567
Figure 10-5. Break Transaction
10.4.5 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 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
Data Sheet
144
READ
ECHO
READ
ADDRESS ADDRESS ADDRESS ADDRESS
HIGH
HIGH
LOW
LOW
DATA
RETURN
Monitor ROM (MON)
MC68HC908LD64 — Rev. 3.0
Freescale Semiconductor