Freescale Semiconductor, Inc.
Monitor Read-Only Memory (MON)
Table 10-6. IWRITE (Indexed Write) Command
Description
Operand
Write to last address accessed + 1
Specifies single data byte
Data Returned
Opcode
None
$19
Command Sequence
SENT TO
MONITOR
IWRITE
IWRITE
DATA
DATA
1
2
1
ECHO
Notes: 1 = Echo delay (2 bit times)
2 = Wait 1 bit time before sending next byte.
Table 10-7. READSP (Read Stack Pointer) Command
Description
Operand
Reads stack pointer
None
Returns stack pointer plus one in high byte:low byte order. The plus one is due to
the use of the TSX instruction.
Data Returned
Opcode
$0C
Command Sequence
SENT TO
MONITOR
READSP
READSP
SP HIGH
SP LOW
1
2
2
RESULT
ECHO
Notes: 1 = Echo delay (2 bit times)
2 = Data return delay (2 bit times)
Advance Information
158
MC68HC908RFRK2
MOTOROLA
Monitor Read-Only Memory (MON)
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