ATDVK90CAN1 Atmel, ATDVK90CAN1 Datasheet - Page 23

• Manufacturer Part Number: ATDVK90CAN1
• Description: KIT DEV FOR AT90CAN128 MCU
• Manufacturer: Atmel

Specifications of ATDVK90CAN1

• Main Purpose: *
• Embedded: *
• Utilized Ic / Part: AT90CAN AVR Devices
• Primary Attributes: *
• Secondary Attributes: *
• Processor To Be Evaluated: AT90CAN
• Data Bus Width: 8 bit
• Interface Type: RS-232, SPI, TWI
• Core Architecture: AVR
• Core Sub-architecture: AVR UC3
• Kit Contents: Board, AT90CAN128 Sample Microcontroller, 9V Battery Power Cable, CD-ROM, Manuals
• Features: RS232, CAN, LIN, SPI & TWI Serial Interface
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

3.7
3.7.1
DVK90CAN1 Hardware User Guide
On-board Resources
Compass Card Keyboard
In case of master LIN, a pull-up resistor is needed. J11 switch enables a 1 K
resistor on the LIN bus.
Table 3-10 . LIN Pull-up
A red LED indicates a TxLIN traffic, a yellow one indicates a RxLIN traffic.
Figure 3-24 . LIN LEDs
The 4 de-centered push-buttons of compass card keyboard are connected to the
synchronous external interrupts INT[7..4] to filter possible pulses.
Pushing a push-button causes the corresponding signal to be pulled low, while releasing
(not pressed) causes an H.Z state on the signal. The user must enable internal pull-ups
on the input pins, removing the need for an external pull-up resistor on the push-button.
150 resistors limit the current going into the AT90CAN128.
The central push-button receives its own filtering and is connected by default to the
asynchronous external interrupt INT[2]. If the “CENTER” switch is set-up in the non-
default configuration, the central push-button is connected as “PortE.2” input.
Pushing a push-button causes the corresponding signal to be pulled low, while releasing
(not pressed) gives a logical “1” without the need of pull-up resistor.
pull-up
Mode
1 K
View
pull-up
Mode
No
Using the DVK90CAN1
View
4381A–AVR–Sept 04
page 21
pull-up