4 break signal, 5 commands, Break signal – Freescale Semiconductor MC68HC08KH12 User Manual
Page 155: Commands, Break transaction
MC68HC(7)08KH12
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Rev. 1.1
Advance Information
Freescale Semiconductor
155
10.4.4 Break Signal
A start bit followed by nine low bits is a break signal.
When the monitor receives a break signal, it drives the PTA0 pin high for
the duration of two bits before echoing the break signal.
Figure 10-5. Break Transaction
10.4.5 Commands
The monitor ROM uses the following commands:
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READ (read memory)
•
WRITE (write memory)
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IREAD (indexed read)
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IWRITE (indexed write)
•
READSP (read stack pointer)
•
RUN (run user program)
0
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7
0
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7
MISSING STOP BIT
TWO-STOP-BIT DELAY BEFORE ZERO ECHO