MC68HC908RK2 Datasheet, PDF (157/232 Pages) Motorola, Inc – Microcontroller Unit

Monitor Read-Only Memory (MON)
Functional Description
Table 10-6. IWRITE (Indexed Write) Command
Description
Write to last address accessed + 1
Operand
Specifies single data byte
Data Returned None
Opcode
$19
Command Sequence
SENT TO
MONITOR
ECHO
IWRITE
IWRITE
DATA
DATA
1
2
1
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
Reads stack pointer
Operand
None
Data Returned
Returns stack pointer plus one in high byte:low byte order. The plus one is due to
the use of the TSX instruction.
Opcode
$0C
Command Sequence
SENT TO
MONITOR
ECHO
READSP
READSP
SP HIGH
SP LOW
1
2
2
RESULT
Notes: 1 = Echo delay (2 bit times)
2 = Data return delay (2 bit times)
MC68HC908RK2 — Rev. 4.0
MOTOROLA
Monitor Read-Only Memory (MON)
Advance Information
157