温度センサー ADT7410をArduinoで制御する(I2C)

ADT7410

Datasheet

Datasheet ADT7410

計測可能な値

種類	概要
温度	温度精度は±0.5℃。-40℃～+105℃（2.7V～3.6V）の範囲。-40℃～+105℃の範囲で計測可能。16ビットの値を取得可能。分解能は0.0078℃。

Slave address

Slave Address	0x48

Register map

Address	Name	Type	Default	概要
0x00	TEMP_MSB	R	00000000	温度 MSB
0x01	TEMP_LSB	R	00000000	温度 LSB
0x02	STATUS	R	00000000	ステータス
0x03	CONFIGURATION	R/W	00000000	Configuration
0x04	THIGH_MSB	R/W	00100000	THIGH MSB
0x05	THIGH_LSB	R/W	00000000	THIGH LSB
0x06	TLOW_MSB	R/W	00000101	TLOW MSB
0x07	TLOW_LSB	R/W	00000000	TLOW LSB
0x08	TCRIT_MSB	R/W	01001001	TCRIT MSB
0x09	TCRIT_LSB	R/W	10000000	TCRIT LSB
0x0A	THYST_MSB	R/W	00000101	THYST setpoint
0x0B	ID	R/W	1100xxxx	ID
0x2F	RESET	R/W	00000000	Software reset

Who_am_i_reh

ID	0x0B

ADT7410の場合、0xCXが返ってくる。

arduino

#define ADT7410_WHO_AM_I_REG 0x0B

#define ADT7410_DEVICE 0xC0

bool searchDevice()
{
  byte device = 0x00;
  readI2c(ADT7410_WHO_AM_I, 1, &device);

  if((device && ADT7410_DEVICE) == ADT7410_DEVICE){
      return true;
  } else{
      return false;
  }
}

Configuration

CONFIGURATION	0x03

Bit7	Bit6	Bit5	Bit4	Bit3	Bit2	Bit1	Bit0
Resolution	Operation mode	Operation mode	INT/CT mode	INT pin	CT pin	Fault	Fault

Fault

Bit1	Bit0	Fault
0	0	1 fault (default).
0	1	2 faults.
1	0	3 faults.
1	1	4 faults.

CT pin

polarity This bit selects the output polarity of the CT pin.

• 0 active low
• 1 active high

INT pin

polarity This bit selects the output polarity of the INT pin.

• 0 active low.
• 1 active high.

INT/CT mode

This bit selects between comparator mode and interrupt mode.

• 0 interrupt mode
• 1 comparator mode

Operation mode

These two bits set the operational mode for the ADT7410.

Bit6	Bit5	操作
0	0	continuous conversion (default)
0	1	one shot. Conversion time is typically 240 ms.
1	0	1 SPS mode. Conversion time is typically 60 ms.
1	1	shutdown.

Resolution

This bit sets up the resolution of the ADC when converting.

• 0 = 13-bit resolution. Sign bit + 12 bits gives a temperature resolution of 0.0625°C.
• 1 = 16-bit resolution. Sign bit + 15 bits gives a temperature resolution of 0.0078°C