MC68HC908GT16 Datasheet, PDF (220/412 Pages) Motorola, Inc – Microcontrollers

Monitor ROM (MON)
A brief description of each monitor mode command is given in
Table 15-4 through Table 15-9.
Table 15-4. READ (Read Memory) Command
Description
Operand
Data
Returned
Opcode
Read byte from memory
2-byte address in high-byte:low-byte order
Returns contents of specified address
$4A
Command Sequence
SENT TO
MONITOR
READ
ECHO
READ
ADDRESS ADDRESS ADDRESS ADDRESS
HIGH
HIGH
LOW
LOW
DATA
RETURN
Table 15-5. WRITE (Write Memory) Command
Description
Operand
Data
Returned
Opcode
Write byte to memory
2-byte address in high-byte:low-byte order; low byte followed by
data byte
None
$49
Command Sequence
FROM
HOST
WRITE
WRITE
ADDRESS ADDRESS ADDRESS ADDRESS
HIGH
HIGH
LOW
LOW
DATA
DATA
ECHO
Technical Data
220
MC68HC908GT16 • MC68HC908GT8 — Rev. 2
Monitor ROM (MON)
MOTOROLA