MC68HC908GR8CD Freescale Semiconductor, MC68HC908GR8CD Datasheet - Page 139

• Manufacturer Part Number: MC68HC908GR8CD
• Description: 8-bit Microcontrollers - MCU 8 Bit 8MHz
• Manufacturer: Freescale Semiconductor

Specifications of MC68HC908GR8CD

• Product Category: 8-bit Microcontrollers - MCU
• Rohs: yes
• Core: HC08
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 8 MHz
• Program Memory Size: 64 KB
• Data Ram Size: 384 B
• Operating Supply Voltage: 3 V to 5 V
• Package / Case: SOIC-28
• Mounting Style: SMD/SMT
• Data Rom Size: 64 KB
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Number Of Programmable I/os: 21
• Program Memory Type: Flash

A sequence of IREAD or IWRITE commands can access a block of memory sequentially over the full 64K
byte memory map.
Freescale Semiconductor
Data Returned
Data Returned
Data Returned
Description
Description
Description
Operand
Operand
Operand
Opcode
Opcode
Opcode
Table 15-8. READSP (Read Stack Pointer) Command
Table 15-9. RUN (Run User Program) Command
Table 15-7. IWRITE (Indexed Write) Command
MC68HC908GR8 • MC68HC908GR4 Data Sheet, Rev. 7
ECHO
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
Executes PULH and RTI instructions
None
None
$28
READSP
FROM
HOST
ECHO
IWRITE
FROM
HOST
READSP
ECHO
IWRITE
Command Sequence
Command Sequence
Command Sequence
FROM
HOST
RUN
DATA
RUN
HIGH
SP
DATA
LOW
SP
RETURN
Functional Description
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