MC68HC908AB32 MOTOROLA [Motorola, Inc], MC68HC908AB32 Datasheet - Page 162

• Manufacturer Part Number: MC68HC908AB32
• Description: HCMOS Microcontroller Unit
• Manufacturer: MOTOROLA [Motorola, Inc]

Monitor ROM (MON)
10.4.3 Echoing
10.4.4 Break Signal
Technical Data
162
As shown in
received byte back to the PTA0 pin for error checking.
Any result of a command appears after the echo of the last byte of the
command.
A start bit followed by nine low bits is a break signal. (See
When the monitor receives a break signal, it drives the PTA0 pin high for
the duration of two bits before echoing the break signal.
SENT TO
MONITOR
Freescale Semiconductor, Inc.
ECHO
For More Information On This Product,
0
1
READ
Go to: www.freescale.com
Figure
2
Monitor ROM (MON)
3
MISSING STOP BIT
Figure 10-5. Break Transaction
Figure 10-4. Read Transaction
4
10-4, the monitor ROM immediately echoes each
READ
5
6
ADDR. HIGH
7
ADDR. HIGH ADDR. LOW ADDR. LOW
TWO-STOP-BIT DELAY BEFORE ZERO ECHO
0
MC68HC908AB32
1
2
3
4
Figure
5
MOTOROLA
—
RESULT
6
DATA
Rev. 1.0
10-5.)
7