MC68HC908GR16 Datasheet, PDF (277/310 Pages) Motorola, Inc – Microcontrollers

Freescale Semiconductor, Inc.
Development Support
Monitor ROM (MON)
A brief description of each monitor mode command is given in Table 19-3 through
Table 19-8.
Table 19-3. 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
READ
ADDRESS ADDRESS ADDRESS ADDRESS
HIGH
HIGH
LOW
LOW
ECHO
DATA
RETURN
Table 19-4. WRITE (Write Memory) Command
Description
Operand
Data Returned
Opcode
FROM HOST
Write byte to memory
2-byte address in high-byte:low-byte order; low byte followed by data byte
None
$49
Command Sequence
WRITE
WRITE
ADDRESS ADDRESS ADDRESS ADDRESS
HIGH
HIGH
LOW
LOW
DATA
ECHO
DATA
Table 19-5. IREAD (Indexed Read) Command
Description
Operand
Data Returned
Opcode
Read next 2 bytes in memory from last address accessed
2-byte address in high byte:low byte order
Returns contents of next two addresses
$1A
Command Sequence
FROM HOST
IREAD
IREAD
DATA
DATA
ECHO
RETURN
MC68HC908GR16 — Rev. 1.0
MOTOROLA
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Data Sheet
277