Freescale Semiconductor MC68HC908MR32 - Manual (Page 261)

Monitor ROM (MON)
MC68HC908MR32 • MC68HC908MR16 Data Sheet, Rev. 6.1
Freescale Semiconductor 261
Table 18-3. 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 18-4. 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
Table 18-5. IREAD (Indexed Read) Command
Description Read next 2 bytes in memory from last address accessed
Operand 2-byte address in high byte:low byte order
Data Returned Returns contents of next two addresses
Opcode $1A
Command Sequence
READ READ
ECHO
SENT TO MONITOR
ADDRESS
HIGH
ADDRESS
HIGH
ADDRESS
LOW
DATA
RETURN
ADDRESS
LOW
WRITE WRITE
ECHO
FROM HOST
ADDRESS
HIGH
ADDRESS
HIGH
ADDRESS
LOW
ADDRESS
LOW
DATA DATA
IREAD IREAD
ECHO
FROM HOST
DATA
RETURN
DATA