Datasheet

Monitor ROM (MON)
Functional Description
MC68HC908GR8 — Rev 4.0 Technical Data
MOTOROLA Monitor ROM (MON) 199
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 Read byte from memory
Operand 2-byte address in high-byte:low-byte order
Data
Returned
Returns contents of specified address
Opcode $4A
Command Sequence
Table 15-5. WRITE (Write Memory) Command
Description Write byte to memory
Operand
2-byte address in high-byte:low-byte order; low byte followed by
data byte
Data
Returned
None
Opcode $49
Command Sequence
READREAD
ECHO
SENT TO
MONITOR
ADDRESS
HIGH
ADDRESS
HIGH
ADDRESS
LOW
DATA
RETURN
ADDRESS
LOW
WRITEWRITE
ECHO
FROM
HOST
ADDRESS
HIGH
ADDRESS
HIGH
ADDRESS
LOW
ADDRESS
LOW
DATA
DATA
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cale Semiconductor,
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