MC68HC08AZ60ACFU MOTOROLA [Motorola, Inc], MC68HC08AZ60ACFU Datasheet - Page 182

• Manufacturer Part Number: MC68HC08AZ60ACFU
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

Monitor ROM (MON)
12.4.3 Echoing
12.4.4 Break Signal
Advance Information
182
SENT TO
MONITOR
ECHO
0
READ
1
2
The monitor ROM immediately echoes each received byte back to the
PTA0 pin for error checking, as shown in
Any result of a command appears after the echo of the last byte of the
command.
A break signal is a start bit followed by nine low bits. This is shown in
Figure
PTA0 pin high for the duration of two bits before echoing the break
signal.
MISSING STOP BIT
3
READ
4
Figure 12-5. Break Transaction
12-4. When the monitor receives a break signal, it drives the
Figure 12-4. Read Transaction
5
6
ADDR. HIGH
Monitor ROM (MON)
7
ADDR. HIGH ADDR. LOW ADDR. LOW
TWO-STOP-BIT DELAY BEFORE ZERO ECHO
0
1
2
Figure
3
MC68HC08AZ60A — Rev 0.0
4
12-4.
5
6
RESULT
DATA
7
MOTOROLA