Hardware Description
2-6
AT89STK-06 Demo Board User Guide
4339B–CAN–11/04
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
If a network termination is needed, JP3 switch inserts a 120
Ω
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
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
5
CAN DB9 front view
pin 2
1
9
6
4
3
2
8
7
CAN-L
pin 7
CAN-H
pin 3
Gnd
pin 5
CAN-SHLD
pin 6
Gnd
(Can be set to Gnd)
Red Rx LED
Green Tx LED
Can Res Jumper
(Here Open)
SPI Connector front view
pin 1
MOSI
pin 2
SS
pin 3
Gnd
pin 5
pin 4
1
5
6
2
3
4
pin 6
Vcc
MISO
SCK
