CAN transceiver
Controller Area Network (CAN) is a broadcast, differential serial bus standard typically used in the automotive industry. CAN features high
immunity to electromechanical noise and arbitration free fixed priority.
STK600 features the ATA6660 CAN transceiver. A male DB9 connector and a 10 pin header is provided for bus connection
If a network termination is needed (CAN baudrate higher than 100 Kb/s), the 'TERM' jumper can be mounted to insert a 120 ohms resistor between
CAN-H and CAN-L.
'SLOPE CTRL' is provided to adjust the CAN signal slopes and prevent unsymmetrical transients on the bus lines. The center pin on 'SLOPE CTRL'
is connected to the ATA6660 RS pin. This must be held below 0.87·VTG which is the standby threshold voltage for AT6660.
Mount a jumper to either side of 'SLOPE CTRL' to prevent AT6660 from going to standby.
The CAN transceiver is connected to the MCU trough the two-pin (rx and tx) 'CAN' header near the switches on STK600. The target MCU can be
any AVR (bit banging or USART), but is more typically one of the AT90CAN series which support the CAN protocol in hardware.
LIN transceiver
Local Interconnect Network (LIN) is a broadcast serial network comprising one master and many (up to 16) slaves. The LIN bus is typically used in
the automotive industry as smaller and less expensive sub-network of a CAN bus to integrate intelligent sensor devices or actuators.
STK600 features the ATA6661 LIN transceiver. a three-pin header serves to connect to the bus. With the ATA6661 an AVR on the STK600 can
implement a LIN master or a LIN slave.
Page 25 of 35
STK600 User Guide
2008-06-20
file://C:\Documents and Settings\PAWEL\Ustawienia lokalne\Temp\~hhE369.htm
