ATA663211 Click

The click communicates with the target MCU through the UART interface and runs on a 3.3V power supply.

ATA663211 click can aslo be used as a standalone LIN transceiver, without being connected to a mikroBUS™ socket. An onboard LDO (low-dropout regulator) enables it to get its power supply through the VS line screw terminal.

LIN transceiver

Low current consumption

Applications

Specifications

What does a LIN transceiver do

LIN or Local Interconnect Network is a protocol used for communication between components in vehicles. The car industry has changed profoundly during this century. Cars have hundreds of sensor applications to measure things like temperature, pressure, air flow, speed, etc. All these applications need to communicate with the main system. The LIN bus was created by European car manufactures in order to establish a new, uniform communication standard. It can be used with CAN (Controller Area Network), but LIN is more cost-effective for simple sensor networks in vehicles.

But what is the difference between LIN and CAN network protocols? CAN is an a really complex interface, and with so many electronic components in a car the manufactures needed a cheaper alternative. The LIN interface is simpler than CAN — LIN uses a single wire communication and the slave nodes are clocked by only one master. CAN interface has nodes that can act independently, receive messages and act. It can have more than one master on the CAN bus. A LIN network is usually made of up to 16 nodes – one master and 15 slaves. This serial communications protocol is also well suited for other industrial applications with electrically harsh environments.

Screw terminals

The click has three screw terminals: VS line for the power supply (up to 40V), GND for ground and LIN line for connecting to the other transceiver LIN line.

Pinout diagram

This table shows how the pinout on ATA663211 click corresponds to the pinout on the mikroBUS™ socket.

Notes	Pin					Pin	Notes
controls an external voltage regulator	INH	1	AN	PWM	16	NC
	NC	2	RST	INT	15	NC
controls the operating mode of the device	EN	3	CS	TX	14	RX	UART Transmit
	NC	4	SCK	RX	13	TX	UART Receive
	NC	5	MISO	SCL	12	NC
	NC	6	MOSI	SDA	11	NC
+3.3V power input	+3.3V	7	3.3V	5V	10	NC
Ground	GND	8	GND	GND	9	GND	Ground

Maximum Ratings

This table shows how the pinout on Grid-EYE click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

Additional pins and jumpers

In addition to mikroBUS the click has four additional pins:

• WKIN — high-input voltage pin used to wake up the device from sleep mode.
• EN — controls the operating mode of the device.
• TXD and RXD — additional UART transmit and receive lines.

EN SEL jumper enables pin selection mode (by default it is always on, good for standalone purposes) otherwise can be LOW – then it is connected to EN pin on the mikroBUS.

Programming

Maximum baud rate which achieved with 2 meter long cable is 19200 bps. Supported compilers C : ARM AVR FT90x PIC PIC32 The following code snippet shows a simple routine which prints received data on a terminal. Any time a click board receives 8 bytes of data it will print received data on another UART. In this case UART3 is used for ATA663211 and UART1 is used to log data.

 1 void main()
 2 {
 3     system_init();
 4 
 5     while( 1 ) {
 6 
 7         if( Button( &GPIOA_IDR , 5, 100, 1 ) ){
 8             ata663211_send( TX_DATA, sizeof( TX_DATA ) );
 9             UART1_Write_Text( "Data Sent" );
10         }
11 
12         if( ( chk = ata6563_rdy() ) == 8 ){
13             ata663211_read( buf, chk );
14             UART1_Write_Text( buf );
15         }
16     }
17 }