mc68hc908jb8 Freescale Semiconductor, Inc, mc68hc908jb8 Datasheet - Page 170

• Manufacturer Part Number: mc68hc908jb8
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Monitor ROM (MON)
10.4.3 Data Format
10.4.4 Echoing
Technical Data
170
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 PTA0 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 10-4. Sample Monitor Waveforms
Monitor ROM (MON)
BIT 1
Figure 10-3. Monitor Data Format
BIT 1
BIT 1
Figure 10-5. Read Transaction
MC68HC908JB8•MC68HC08JB8•MC68HC08JT8 — Rev. 2.3
READ
10-5, 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 10-3
BIT 5
BIT 5
BIT 5
BIT 6
BIT 6
BIT 6
BIT 7
and
Freescale Semiconductor
BIT 7
BIT 7
ADDR. LOW
STOP
Figure
BIT
STOP
STOP
BIT
BIT
START
NEXT
BIT
START
START
NEXT
NEXT
10-4.)
BIT
BIT
RESULT
DATA