MCP9804T-E/MC Microchip Technology, MCP9804T-E/MC Datasheet - Page 45

• Manufacturer Part Number: MCP9804T-E/MC
• Description: IC TEMP SENSOR I2C 2.7V 8DFN
• Manufacturer: Microchip Technology

Specifications of MCP9804T-E/MC

• Package / Case: 8-DFN
• Function: Temp Monitoring System (Sensor)
• Topology: ADC (Sigma Delta), Register Bank
• Sensor Type: Internal
• Sensing Temperature: -40°C ~ 125°C
• Output Type: I²C™/SMBus™
• Output Alarm: No
• Output Fan: No
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Temperature Threshold: + 150 C
• Full Temp Accuracy: +/- 0.25 %
• Digital Output - Bus Interface: 2-Wire, I2C
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.7 V
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Supply Current: 200 uA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: MCP9804T-E/MCTR

/********************************************************************
*
*
*
*
*
********************************************************************/
unsigned char i2c_write( unsigned char i2cWriteData ) {
ted)
}
/********************************************************************
*
*
*
*
********************************************************************/
unsigned char i2c_read( unsigned char ack ) {
}
© 2009 Microchip Technology Inc.
PIR1bits.SSPIF = 0; // clear interrupt
while ( SSPSTATbits.BF ) ;
SSPBUF = i2cWriteData;
while (!PIR1bits.SSPIF) ;
PIR1bits.SSPIF = 0; // clear flag
return ( !SSPCON2bits.ACKSTAT ); // function returns '1' if transmission is acknowledged
unsigned char i2cReadData;
PIR1bits.SSPIF = 0;// clear interrupt
while ( SSPSTATbits.BF ) ; // wait for idle condition
SSPCON2bits.RCEN = 1;
while (!PIR1bits.SSPIF) ; // wait for a flag to be set
PIR1bits.SSPIF = 0;// clear flag
i2cReadData = SSPBUF;
if ( ack ) {
} else {
}
SSPCON2bits.ACKEN = 1;
while (!PIR1bits.SSPIF) ; // wait for a flag to be set
PIR1bits.SSPIF = 0;// clear flag
return( i2cReadData );
Function Name:
Return Value:
Parameters:
Description:
Function Name:
Return Value:
Parameters:
Description:
SSPCON2bits.ACKDT = 0;
SSPCON2bits.ACKDT = 1;
i2c_write
Status byte for WCOL detection.
Single data byte for I2C2 bus.
This routine writes a single byte to the
I2C2 bus.
i2c_read
contents of SSP2BUF register
ack = 1 and nak = 0
Read a byte from I2C bus and ACK/NAK device
// wait for a flag to be set
// wait for idle condition
// enable receive mode
// Read SSPBUF and put it in i2cReadData
// if ack=1
//
//
// send acknowledge sequence
// return the value read from SSPBUF
// Load SSPBUF with i2cWriteData (the value to be transmit-
then transmit an Acknowledge
otherwise transmit a Not Acknowledge
MCP9804
DS22203B-page 45