MC908AP32CFBE Freescale, MC908AP32CFBE Datasheet - Page 121

• Manufacturer Part Number: MC908AP32CFBE
• Manufacturer: Freescale

Specifications of MC908AP32CFBE

• Cpu Family: HC08
• Device Core Size: 8b
• Frequency (max): 8MHz
• Interface Type: SCI/SPI
• Total Internal Ram Size: 2KB
• # I/os (max): 32
• Number Of Timers - General Purpose: 4
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 2.7V
• On-chip Adc: 8-chx10-bit
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 44
• Package Type: PQFP
• Program Memory Type: Flash
• Program Memory Size: 32KB
• Lead Free Status / RoHS Status: Compliant

8.3.5 Commands
The monitor ROM firmware uses these commands:
The monitor ROM firmware echoes each received byte back to the PTA0 pin for error checking. An 11-bit
delay at the end of each command allows the host to send a break character to cancel the command. A
delay of two bit times occurs before each echo and before READ, IREAD, or READSP data is returned.
The data returned by a read command appears after the echo of the last byte of the command.
A brief description of each monitor mode command is given in
Freescale Semiconductor
•
•
•
•
•
•
READ (read memory)
WRITE (write memory)
IREAD (indexed read)
IWRITE (indexed write)
READSP (read stack pointer)
RUN (run user program)
3
FROM HOST
ECHO
Notes:
ECHO
Notes:
4
WRITE
1 = Echo delay, 2 bit times
2 = Cancel command delay, 11 bit times
3 = Wait 1 bit time before sending next byte.
FROM HOST
1 = Echo delay, 2 bit times
2 = Data return delay, 2 bit times
3 = Cancel command delay, 11 bit times
4 = Wait 1 bit time before sending next byte.
READ
Wait one bit time after each echo before sending the next byte.
1
1
WRITE
READ
3
ADDRESS
4
HIGH
MC68HC908AP Family Data Sheet, Rev. 4
ADDRESS
HIGH
Figure 8-5. Read Transaction
Figure 8-6. Write Transaction
1
ADDRESS
1
HIGH
ADDRESS
HIGH
3
ADDRESS
NOTE
4
LOW
ADDRESS
LOW
1
ADDRESS
1
LOW
ADDRESS
LOW
Table 8-4
3
DATA
3, 2
1
through
DATA
DATA
Table
RETURN
4
Functional Description
2, 3
8-9.
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