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M68ICS08GR датащи(PDF) 196 Page - Freescale Semiconductor, Inc

номер детали M68ICS08GR
подробное описание детали  M68HC08 Microcontrollers
PDF  408 Pages
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производитель  FREESCALE [Freescale Semiconductor, Inc]
домашняя страница  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

M68ICS08GR датащи(HTML) 196 Page - Freescale Semiconductor, Inc

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Monitor ROM (MON)
Technical Data
MC68HC908GR8 — Rev 4.0
196
Monitor ROM (MON)
MOTOROLA
Table 15-2 summarizes the differences between user mode and monitor
mode.
15.4.2 Data Format
Communication with the monitor ROM is in standard non-return-to-zero
(NRZ) mark/space data format. Transmit and receive baud rates must
be identical.
Figure 15-3. Monitor Data Format
15.4.3 Break Signal
A start bit (logic 0) followed by nine logic 0 bits is a break signal. When
the monitor receives a break signal, it drives the PTA0 pin high for the
duration of two bits and then echoes back the break signal.
Figure 15-4. Break Transaction
Table 15-2. Mode Differences
Modes
Functions
Reset
Vector
High
Reset
Vector
Low
Break
Vector
High
Break
Vector
Low
SWI
Vector
High
SWI
Vector
Low
User
$FFFE
$FFFF
$FFFC
$FFFD
$FFFC
$FFFD
Monitor
$FEFE
$FEFF
$FEFC
$FEFD
$FEFC
$FEFD
BIT 5
START
BIT
BIT 1
NEXT
STOP
BIT
START
BIT
BIT 2
BIT 3
BIT 4
BIT 7
BIT 0
BIT 6
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
MISSING STOP BIT
2-STOP BIT DELAY BEFORE ZERO ECHO
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com



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