XC908AS60ACFU Motorola Semiconductor Products, XC908AS60ACFU Datasheet - Page 214

• Manufacturer Part Number: XC908AS60ACFU
• Description: MC68HC908AZ60A, MC68HC908AS60A Hcmos Microcontroller Unit Technical Data
• Manufacturer: Motorola Semiconductor Products

Monitor ROM (MON)
14.4.3 Echoing
14.4.4 Break Signal
Technical Data
214
SENT TO
MONITOR
ECHO
0
READ
1
2
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.
3
MISSING STOP BIT
READ
4
Figure 14-5. Break Transaction
Figure 14-4. Read Transaction
5
Figure
6
ADDR. HIGH
Monitor ROM (MON)
7
14-4, the monitor ROM immediately echoes each
ADDR. HIGH
TWO-STOP-BIT DELAY BEFORE ZERO ECHO
0
ADDR. LOW
1
2
3
ADDR. LOW
MC68HC908AZ60A — Rev 2.0
4
5
6
RESULT
DATA
Figure
7
MOTOROLA
14-5).