Thermo 4 Click Board

Product Description

The Thermo Click Board™ carries the NXP LM75A digital temperature sensor and thermal watchdog. The sensor has the  range from −55 °C to +125 °C . The click is designed to run on either 3.3V or 5V power supply. It communicates with the target microcontroller over I2C interface, with additional functionality provided by the INT pin on the mikroBUS™ line.

LM75A Features

The NXP LM75A is a temperature-to-digital converter using an on-chip band gap temperature sensor and Sigma-delta A-to-D conversion technique. The device is also a thermal detector providing an overtemperature detection output.

The sensor can be configured for different operation conditions. It can be set in normal mode to periodically monitor the ambient temperature, or in shutdown mode to minimize power consumption.

The temperature register always stores an 11-bit 2's complement data giving a temperature resolution of 0.125 °C. This high temperature resolution is particularly useful in applications of measuring precisely the thermal drift or runaway.

SPECIFICATIONS

PINOUT DIAGRAM

This table shows how the pinout on the Thermo Click Board™  corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

Notes	Pin					Pin	Notes
NC	1	AN	PWM	16	NC
NC	2	RST	INT	15	INT	Overtemp Shutdown output
NC	3	CS	TX	14	NC
NC	4	SCK	RX	13	NC
NC	5	MISO	SCL	12	SCL	I2C-bus serial clock input
NC	6	MOSI	SDA	11	SDA	I2C-bus serial bidirectional data line
Power supply	+3.3V	7	3.3V	5V	10	+5V	Power supply
Ground	GND	8	GND	GND	9	GND	Ground

JUMPERS AND SETTINGS

Software Support

01 void main()
02 {
03 
04    system_init();
05     thermo_init(0x55);
06     Delay_ms (100);
07     i=5;
08 
09 
10    /*sets the temperature limit to specified float value*/
11     thermo_write_temperature (65.5, THERMO_TOS);
12     /*reads stored temperature limit*/
13     thermo_read_temperature_text (uart_text, THERMO_TOS);
14     Delay_ms (100);
15         
16    UART_Write_Text("rn Current temperature limit for output signal: ");
17     UART_Write_Text(uart_text);
18     Delay_ms( 1000 );
19 
20        /*reads current temperature in fahrenheit*/
21     _fh_value = thermo_read_temperature_fh (THERMO_TEMP);
22     FloatToStr (_fh_value , uart_text);
23     uart_text [5] = 0;
24     Delay_ms (100);
25     UART_Write_Text("rn rn Current temperature in Fahrenheit: ");
26     UART_Write_Text(uart_text);
27     Delay_ms( 1000 );

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