MC68HC908LJ12 Datasheet, PDF (166/413 Pages) Freescale Semiconductor, Inc – 8-bit microcontroller units

Monitor ROM (MON)
Table 10-7. IWRITE (Indexed Write) Command
Description
Operand
Data
Returned
Opcode
Write to last address accessed + 1
Single data byte
None
$19
FROM
HOST
Command Sequence
IWRITE
IWRITE
DATA
DATA
ECHO
A sequence of IREAD or IWRITE commands can access a block of
memory sequentially over the full 64k-byte memory map.
Table 10-8. READSP (Read Stack Pointer) Command
Description
Operand
Data
Returned
Opcode
Reads stack pointer
None
Returns incremented stack pointer value (SP + 1) in
high-byte:low-byte order
$0C
Command Sequence
FROM
HOST
READSP READSP
ECHO
SP
SP
HIGH
LOW
RETURN
MC68HC908LJ12 — Rev. 2.1
Freescale Semiconductor
Monitor ROM (MON)
Technical Data
167