mc68hc908jb16 Freescale Semiconductor, Inc, mc68hc908jb16 Datasheet - Page 130

• Manufacturer Part Number: mc68hc908jb16
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Monitor ROM (MON)
9.4.5 Commands
Technical Data
130
NOTE:
The monitor ROM uses the following 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.
•
•
•
•
•
•
ECHO
Notes:
4
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.
FROM
HOST
READ
READ (read memory)
WRITE (write memory)
IREAD (indexed read)
IWRITE (indexed write)
READSP (read stack pointer)
RUN (run user program)
1
READ
Monitor ROM (MON)
4
ADDRESS
Figure 9-5. Read Transaction
HIGH
1
ADDRESS
HIGH
4
ADDRESS
LOW
1
ADDRESS
LOW
MC68HC908JB16
Freescale Semiconductor
3, 2
DATA
—
RETURN
4
Rev. 1.1