MC68HC908KX2 MOTOROLA [Motorola, Inc], MC68HC908KX2 Datasheet - Page 262

• Manufacturer Part Number: MC68HC908KX2
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

Monitor ROM (MON)
18.10 Commands
Technical Data
262
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.
4
ECHO
Notes:
4
ECHO
Notes:
•
•
•
•
•
•
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.
WRITE
1 = Echo delay, 2 bit times
3 = Cancel command delay, 11 bit times
4 = Wait 1 bit time before sending next byte.
READ
READ, read memory
WRITE, write memory
IREAD, indexed read
IWRITE, indexed write
READSP, read stack pointer
RUN, run user program
FROM
HOST
FROM
HOST
1
1
WRITE
READ
Monitor ROM (MON)
MC68HC908KX8 • MC68HC908KX2 • MC68HC08KX8 — Rev. 1.0
4
4
ADDRESS
ADDRESS
HIGH
HIGH
Figure 18-5. Write Transaction
Figure 18-4. Read Transaction
1
1
ADDRESS
ADDRESS
HIGH
HIGH
4
4
ADDRESS
ADDRESS
LOW
LOW
1
1
ADDRESS
ADDRESS
LOW
LOW
4
DATA
3, 2
1
DATA
'$7$
MOTOROLA
RETURN

3, 4