AN2503 Freescale Semiconductor / Motorola, AN2503 Datasheet - Page 19

• Manufacturer Part Number: AN2503
• Description: Slave LIN Driver for the MC68HC908QT/QY Family
• Manufacturer: Freescale Semiconductor / Motorola

MOTOROLA
LIN Baud Rate
Timer Used as
Functionality
Transceiver
Number of
Pins Used
Oscillator
Use of
Mode
Rx
DISABLE_TRANSCEIVER
ENABLE_TRANSCEIVER
MEDIUM_SPEED
Possible Values
TIMER_USED_1
TIMER_USED_0
SLOW_SPEED
HIGH_SPEED
.
EXT_OSC
INT_OSC
Two Pins
One Pin
Slave LIN Driver for the MC68HC908QT/QY Family
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
Table 2. Modules
Internal oscillator is used.
Synch field used to trim the internal oscillator.
Very useful to reduce costs.
External oscillator is used.
Because no trimming is performed, code is
Useful to increment the internal frequency (if a
Predefined baud rate for medium LIN speed of
Predefined baud rate for high LIN speed of
Code increments because adjustments must be
Predefined baud rate for slow LIN speed of
Code increments because adjustments must be
Timer channel pin used is used as Rx and Tx.
Useful when testing with a CPU serial port using
Timer channel pin is used as Rx pin only and a
Used more often because it accommodates
Timer channel 1 (PTA1) is used as Rx.
Very useful when used with MON08 because
Ensure that it has a high value when entering
Timer channel 0 (PTA0) is used as RX.
Very useful when the same line for monitor mode
Monitor mode can be used for programming
Transceiver is used.
It must be properly enabled/disabled
Transceiver is not used.
Useful for testing purposes with a CPU.
reduced.
fast oscillator is used) but more expensive.
9600 bps.
19200 bps.
made to accomplish this baud rate.
2400 bps.
made to accomplish this baud rate.
only one line (using the same PTA0 used for
MON08 communication).
general-purpose pin is used as Tx only.
transceivers.
PTA0 can be used at the same time for monitor
mode communication.
monitor mode.
is used for testing with a CPU serial port.
purposes only, not for debugging.
Description
Driver Configuration
Increment
+18 bytes
+12 bytes
–93 bytes
–10 bytes
Size
AN2503/D
+0
+0
+0
+0
+0
+0
+0
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