MC68HC908GZ8 FREESCALE [Freescale Semiconductor, Inc], MC68HC908GZ8 Datasheet - Page 283

• Manufacturer Part Number: MC68HC908GZ8
• Description: M68HC08 Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

A sequence of IREAD or IWRITE commands can access a block of memory sequentially over the full
64-Kbyte memory map.
Freescale Semiconductor
Data Returned
Data Returned
Data Returned
Description
Description
Description
ECHO
FROM HOST
WRITE
Operand
Operand
Operand
Opcode
Opcode
Opcode
WRITE
Table 20-6. IWRITE (Indexed Write) Command
Table 20-4. WRITE (Write Memory) Command
Write byte to memory
2-byte address in high-byte:low-byte order; low byte followed by data byte
None
$49
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
MC68HC908GZ16 • MC68HC908GZ8 Data Sheet, Rev. 4
Table 20-5. IREAD (Indexed Read) Command
ECHO
FROM HOST
FROM HOST
ADDRESS
ECHO
IREAD
IWRITE
HIGH
ADDRESS
IREAD
IWRITE
HIGH
Command Sequence
Command Sequence
Command Sequence
ADDRESS
LOW
DATA
ADDRESS
LOW
DATA
DATA
DATA
DATA
RETURN
DATA
Monitor ROM (MON)
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