mc68hc908gr16 Freescale Semiconductor, Inc, mc68hc908gr16 Datasheet - Page 250

• Manufacturer Part Number: mc68hc908gr16
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

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A sequence of IREAD or IWRITE commands can access a block of memory sequentially over the full
64-Kbyte memory map.
250
Data Returned
Data Returned
Data Returned
Description
Description
Description
Operand
Operand
Operand
Opcode
Opcode
Opcode
Table 19-7. READSP (Read Stack Pointer) Command
Table 19-6. IWRITE (Indexed Write) Command
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
Write to last address accessed + 1
Single data byte
None
$19
Reads stack pointer
None
Returns incremented stack pointer value (SP + 1) in high-byte:low-byte order
$0C
Table 19-5. IREAD (Indexed Read) Command
ECHO
FROM HOST
ECHO
READSP
FROM HOST
FROM HOST
ECHO
IREAD
IWRITE
MC68HC908GR16 Data Sheet, Rev. 5.0
READSP
IREAD
IWRITE
Command Sequence
Command Sequence
Command Sequence
DATA
HIGH
SP
DATA
DATA
LOW
SP
DATA
RETURN
RETURN
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