MC68HC908JK3 MOTOROLA [Motorola, Inc], MC68HC908JK3 Datasheet - Page 108

• Manufacturer Part Number: MC68HC908JK3
• Description: MC68HC908JK1
• Manufacturer: MOTOROLA [Motorola, Inc]

Monitor ROM (MON)
9.4.3 Data Format
9.4.4 Echoing
Technical Data
108
Communication with the monitor ROM is in standard non-return-to-zero
(NRZ) mark/space data format. (See
The data transmit and receive rate can be anywhere from 4800 baud to
28.8k-baud. Transmit and receive baud rates must be identical.
As shown in
received byte back to the PTB0 pin for error checking.
Any result of a command appears after the echo of the last byte of the
command.
BREAK
SENT TO
MONITOR
$A5
ECHO
START
BIT
START
START
BIT
BIT
BIT 0
READ
Figure
BIT 0
BIT 0
Figure 9-4. Sample Monitor Waveforms
Monitor ROM (MON)
BIT 1
Figure 9-3. Monitor Data Format
BIT 1
BIT 1
Figure 9-5. Read Transaction
READ
9-5, the monitor ROM immediately echoes each
BIT 2
BIT 2
BIT 2
BIT 3
ADDR. HIGH
BIT 3
BIT 3
BIT 4
BIT 4
BIT 4
ADDR. HIGH ADDR. LOW
Figure 9-3
BIT 5
BIT 5
BIT 5
BIT 6
BIT 6
BIT 6
MC68H(R)C908JL3
and
BIT 7
BIT 7
BIT 7
Figure
ADDR. LOW
STOP
BIT
STOP
STOP
BIT
BIT
START
NEXT
BIT
MOTOROLA
9-4.)
START
START
NEXT
NEXT
BIT
BIT
—
RESULT
DATA
Rev. 1.0