ATA6621-EK Atmel, ATA6621-EK Datasheet - Page 2

• Manufacturer Part Number: ATA6621-EK
• Description: MCU, MPU & DSP Development Tools Demoboard LIN SBC
• Manufacturer: Atmel

1.1
1.2
2
Development Board Features
Quick Start
Atmel ATA6621/22/24/26
Another difference is unequal watchdog timing (see
The combination of the features included in the Atmel
to develop simple, but powerful and cheap, slave nodes in LIN-bus systems.
The ICs are designed to handle the low-speed data communication in vehicles, for example, in
convenience electronics. Improved slope control at the LIN driver ensures secure data com-
munication up to 20Kbaud.
Sleep Mode and Silent Mode guarantee a very low current consumption.
This document has been developed to give the user an easy start with the development board
of the Atmel ATA6621/22/24/26. For more detailed information about the use of these devices
themselves, refer to the corresponding datasheets.
The development board for the Atmel ATA6621/22/24/26 supports the following features:
The development board for the Atmel ATA6621/22/24/26 is shipped with all necessary compo-
nents and a default jumper setting to start with the development of a LIN slave node
immediately.
After connecting an external 12V DC power supply between the terminals VB and GND, the
circuit is in the Pre-normal mode (Fail-safe mode) and a 5V (3.3V) DC voltage provided by the
internal voltage regulator can be measured between VCC and GND. (The Pre-normal mode is
called Fail-safe mode in the datasheets of the devices Atmel ATA6622/24/26). Furthermore,
the following voltages or states can be measured at the pins WD_OSC, TEMP, INH, RXD and
LIN:
Table 1-2.
• All necessary components to put the Atmel ATA6621/22/24/26 in operation are included
• Placeholders for some optional components for extended functions included
• All pins easily accessible
• Easily adaptable watchdog times by replacing a resistor
• Possibility to place an external NPN transistor for boosting up the output current of the
• Possibility of selecting between master or slave operation (mounting D3 and R4)
Pre-normal mode
voltage regulator (jumper J1)
Normal mode
Mode
Atmel ATA6621
VCC
5V
5V
WD_OSC
2.5V
2.5V
TEMP
~2V
~2V
INH
-
-
Section 2.3 on page
®
ATA6621/22/24/26 makes it possible
RXD
5V
5V
TXD dependent
Recessive
LIN
4).
4970B–AUTO–03/11
Transceiver
Off
On