mc68hc908mr32 Freescale Semiconductor, Inc, mc68hc908mr32 Datasheet - Page 260
mc68hc908mr32
Manufacturer Part Number
mc68hc908mr32
Description
M68hc08 Microcontrollers
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC68HC908MR32.pdf
(282 pages)
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18.3.1.5 Echoing
As shown in
pin for error checking.
Any result of a command appears after the echo of the last byte of the command.
18.3.1.6 Break Signal
A start bit followed by nine low bits is a break signal. See
signal, it drives the PTA0 pin high for the duration of two bits before echoing the break signal.
18.3.1.7 Commands
The monitor ROM uses these commands (see
260
•
•
•
•
•
•
READ, read memory
WRITE, write memory
IREAD, indexed read
IWRITE, indexed write
READSP, read stack pointer
RUN, run user program
Figure
SENT TO
MONITOR
ECHO
18-11, the monitor ROM immediately echoes each received byte back to the PTA0
0
1
READ
MC68HC908MR32 • MC68HC908MR16 Data Sheet, Rev. 6.1
2
3
MISSING STOP BIT
Figure 18-12. Break Transaction
4
READ
Figure 18-11. Read Transaction
5
6
ADDR. HIGH
7
Table 18-3–Table
ADDR. HIGH ADDR. LOW
Figure
2--STOP-BIT DELAY BEFORE ZERO ECHO
0
18-12. When the monitor receives a break
1
18-8):
2
ADDR. LOW
3
4
5
6
RESULT
DATA
Freescale Semiconductor
7
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