mc68hc908qf4 Freescale Semiconductor, Inc, mc68hc908qf4 Datasheet - Page 170

• Manufacturer Part Number: mc68hc908qf4
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Development Support
16.3.1.7 Commands
Data Sheet
170
NOTE:
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.
Wait one bit time after each echo before sending the next byte.
A brief description of each monitor mode command is given in
through
•
•
•
•
•
•
3
Notes:
ECHO
Notes:
1 = Echo delay, approximately 2 bit times
2 = Data return delay, approximately 2 bit times
WRITE
ECHO
1 = Echo delay, approximately 2 bit times
2 = Cancel command delay, 11 bit times
3 = Wait 1 bit time before sending next byte.
4
FROM
HOST
READ (read memory)
WRITE (write memory)
IREAD (indexed read)
IWRITE (indexed write)
READSP (read stack pointer)
RUN (run user program)
Freescale Semiconductor, Inc.
FROM
HOST
READ
Table
For More Information On This Product,
1
WRITE
1
16-8.
READ
Go to: www.freescale.com
3
Development Support
ADDRESS
4
HIGH
ADDRESS
Figure 16-17. Write Transaction
Figure 16-16. Read Transaction
HIGH
1
ADDRESS
1
HIGH
ADDRESS
HIGH
3
ADDRESS
4
LOW
ADDRESS
LOW
3 = Cancel command delay, 11 bit times
4 = Wait 1 bit time before sending next byte.
1
ADDRESS
1
LOW
ADDRESS
LOW
3
DATA
MC68HC908QF4 — Rev. 1.0
3, 2
1
DATA
DATA
Table 16-3
MOTOROLA
RETURN
4
2, 3