AN2503 Freescale Semiconductor / Motorola, AN2503 Datasheet - Page 25

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

Hardware Implementation
MC68HC908QY4
Signal Description
MOTOROLA
1.
MESSAGES_ROM_ADDRESS
This LIN driver is intended to be flexible with user hardware. This
demonstration is implemented in MC68HC908QY4 slave LINkit hardware (see
Schematic).
The main features of the MC68HC908QY4 MCU are:
Where xx is the ID number in hexadecimal format
Slave LIN Driver for the MC68HC908QT/QY Family
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Freescale Semiconductor, Inc.
LIN_MSG_xx_LEN
POINTER_TO_LAST
For More Information On This Product,
LIN_MSG_xx
4 K of FLASH memory (1.5 K in the MC68HC908QY1/QY2)
128 bytes of RAM memory
No SCI module
Some pins share functionality (ADC, TIM, KBI, OSC, IRQ, and RST).
One timer with two channels (TIMCH0 and TIMCH1)
Timer has input capture, output compare and overflow functionality.
External interrupt (IRQ) available at PTA2.
Reset (RST) available at PTA3, not enabled by default.
Oscillator (OSC) pins available at PTA4/PTA5.
One general-purpose only 8-bit port (PTB).
PTA0 (TIMCH0) is used to enter monitor mode and program the MCU.
PTA1 (TIMCH1) must be tied high when entering monitor mode.
Internal oscillator available; external oscillator can be used.
Internal frequency using internal oscillator is 3.2 MHz ±5% before
trimming.
LIN_MSGS
Macro
Go to: www.freescale.com
Table 7. Constants Defined in linmsgid.h
(1)
(1)
Start address for the ROM table (16 bits).
Number of IDs defined (1 to 64 bits).
Direction of ID:
LIN_RECEIVE — Data will be received in the
LIN_SEND — Data in buffer will be sent when an
Length of data (buffer) to be received. (1–8 bits)
Auto-calculated pointer points to the last ID in
Do not change.
buffer when an ID arrives.
ID arrives.
ROM table.
Description
Hardware Implementation
AN2503/D
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