Freescale Semiconductor MC68HC908MR32 - Manual (Page 262)

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MC68HC908MR32 • MC68HC908MR16 Data Sheet, Rev. 6.1
262 Freescale Semiconductor
A sequence of IREAD or IWRITE commands can access a block of memory sequentially over the full
64-Kbyte memory map.
Table 18-6. IWRITE (Indexed Write) Command
Description Write to last address accessed + 1
Operand Single data byte
Data Returned None
Opcode $19
Command Sequence
Table 18-7. READSP (Read Stack Pointer) Command
Description Reads stack pointer
Operand None
Data Returned Returns incremented stack pointer value (SP + 1) in high-byte:low-byte order
Opcode $0C
Command Sequence
Table 18-8. RUN (Run User Program) Command
Description Executes PULH and RTI instructions
Operand None
Data Returned None
Opcode $28
Command Sequence
IWRITE IWRITE
ECHO
DATA DATA
FROM HOST
READSP READSP
ECHO
FROM HOST
SP
RETURN
SP
HIGH LOW
RUN RUN
ECHO
FROM HOST