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4970A–AUTO–01/07

ATA6621/22/24 Development Board

5. The Development Board in a Simple Application

To show just how easy it is to develop a LIN-based application with the development board for

the ATA6621/22/24, here is a little example for a complete LIN slave node consisting of the

ATA6621 and the microcontroller ATmega88, a flasher controlled via the LIN bus.

The LIN interface of the slave is implemented with the ATA6621 and the control of the flasher

as well as the protocol handling is done by the ATmega88 microcontroller. In the schematic of

this slave node it is obvious that there are almost no other external components needed to ful-

fill the requirements of this application, other than the development board of the

ATA6621/22/24 and the ATmega88.

Figure 5-1. Simple Application Using the Development Board for the ATA6621/22/24 (Schematic)

91011 1312

32 31 30 28

196

187

178

ATMEGA88

PD3

PB1

PB2

PB3

PB4

PD5

PD6

PD7

PB0

PC5

PC4

PC3

PC2

PD2

PD1

PD0

PC6/NRST

PD4

GND (3)

VCC (4)

GND (5)

VCC (6)

PB6

PB7

PC1

PC0

ADC7

TXD

LED2

Flasher

NTRIGRXD

ENLED1NRES

GND (21)

TEMP

PB1 PB4PB3

PVCC

JP1

PB5

AREF

ADC6

AVCC

PB5

GND (33)

PVCC

LIN

XL2

XL1

1 kΩ

100 µF

10 µF

100 nF

PB1

100 nF

BC817-40

330Ω

LEDLED

LED1

XISP1

ISP

LED2

D2D1

330Ω

100 nF

MLF 5 mm × 5 mm

0.5 mm pitch

32 lead

PVCCPB4

PB3PB5

NRES

RXD

TXD

LIN

NTRIG

NRES

Development board

ATA6621/6622/6624

JP2

TEMP

1 2 ... 10 11 12 13 14 15 16 17

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