MCP9804-E/MS Microchip Technology, MCP9804-E/MS Datasheet - Page 46

• Manufacturer Part Number: MCP9804-E/MS
• Description: IC TEMP SENSOR I2C 2.7V 8MSOP
• Manufacturer: Microchip Technology

Specifications of MCP9804-E/MS

• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• 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
• Ic Output Type: Digital
• Sensing Accuracy Range: ± 0.25°C
• Temperature Sensing Range: -40°C To +125°C
• Supply Voltage Range: 2.7V To 5.5V
• Sensor Case Style: MSOP
• No. Of Pins: 8
• Rohs Compliant: Yes
• Supply Voltage Min: 2.7V
• Leaded Process Compatible: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

MCP9804
/********************************************************************
*
*
*
*
********************************************************************/
unsigned char ReadI2C(unsigned char ACK)
{
}
/********************************************************************
*
*
*
*
********************************************************************/
void ACKI2C(void)
{
}
/********************************************************************
*
*
*
*
********************************************************************/
void nACK(void)
{
}
/********************************************************************
*
*
*
*
********************************************************************/
void WaitForACK(void)
{
}
DS22203A-page 46
while (SSPSTATbits.BF);
SSPCON2bits.RCEN = 1;
while (!SSPSTATbits.BF);
if ACK
else
return (SSPBUF);
PIR1bits.SSPIF = 0;
SSPCON2bits.ACKDT = 0;
SSPCON2bits.ACKEN = 1;
while(!PIR1bits.SSPIF);
PIR1bits.SSPIF = 0;
PIR1bits.SSPIF = 0;
SSPCON2bits.ACKDT = NACK;
SSPCON2bits.ACKEN = 1;
while(!PIR1bits.SSPIF);
PIR1bits.SSPIF = 0;
PIR1bits.SSPIF = 0;
while(!PIR1bits.SSPIF); //Wait for data received Interrupt
PIR1bits.SSPIF = 0;//Clear Interrupt
ACKI2C();
nACK();
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//
ReadI2C2
contents of SSP2BUF register
ACK = 1 and NAK = 0
Read a byte from I2C bus and ACK/NAK
AckI2C
void
void
Initiate ACK bus condition.
nACKI2C
void
void
Initiate no-ACK bus condition.
WaitForACK
void
void
//Clear Interrupt
// Give ACK
//Wait for flag to set
//Start ACK sequence
//Disable ACK
// enable master for 1 byte reception
// wait until byte received
// return with read byte
*
// set acknowledge bit state for ACK
// initiate bus acknowledge sequence
*
*
*
*
*
*
*
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© 2009 Microchip Technology Inc.