Hardware Description
2.4.2
CAN
The microcontroller is a microcontroller with an on-chip full-CAN controller.
The AT89STK-06 board is supplied with an Atmel CAN transceiver (ATA6660). A
female DB9 connector assumes the CAN bus connections.
Figure 2-7 . CAN DB9 Connections
pin 2
CAN-L
CAN DB9 front view
1 2 3 4 5
6 7 8 9
pin 7
pin 3
pin 6
pin 5
CAN-H
Gnd
Gnd
CAN-SHLD
(Can be set to Gnd)
If a network termination is needed, JP3 switch inserts a 120 ? resistor between CAN-H
and CAN-L.
A red LED indicates a TxCAN traffic, a green one indicates a RxCAN traffic.
Figure 2-8 . CAN LEDs
Can Res Jumper
(Here Open)
Red Rx LED
Green Tx LED
2.4.3
SPI
The AT89C51CC03 in PLCC52 is a microcontroller with an on-chip full duplex SPI
interface, master or slave.
A 6-pin male connector assumes the SPI bus connections. The SPI 6-pin connector also
provides to the user Vcc and Gnd.
Figure 2-9 . SPI 6-pin Connections
SPI Connector front view
pin 1
Vcc
1
2
3
4
5
6
pin 2
pin 3
SS
MISO
pin 4
pin 5
pin 6
SCK
MOSI
Gnd
2-6
4339C–CAN–07/05
AT89STK-06 Demo Board Software Demo Guide
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