MCP9804T-E/MC Microchip Technology, MCP9804T-E/MC Datasheet - Page 20

• 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

MCP9804
FIGURE 5-2:
DS22203B-page 20
• Writing to the CONFIG Register to Enable the Event Output pin <0000 0000 0000 1000>b.
SDA
SCL
Note: this is an example routine: (See Appendix A: “Source Code”)
i2c_start();
i2c_write(AddressByte & 0xFE);
i2c_write(0x01);
i2c_write(0x00);
i2c_write(0x08);
i2c_stop();
Timing Diagram for Writing to the Configuration Register (See Section 4.0.
S
1
0
2
0
Address Byte
3
1
4
1
5
A
2
A
6
1
1
0
7
A
0
2
0
MCP9804
W
8
3
0
MSB Data
A
C
K
4
0
// send START command
//WRITE Command (see Section 4.1.4)
//also, make sure bit 0 is cleared ‘0’
// Write CONFIG Register
// Write data
// Write data
// send STOP command
1
0
5
0
Configuration Pointer
2
0
0
6
3
0
7
0
MCP9804
4
0
8
0
5
0
A
C
K
6
0
1
0
7
0
2
0
MCP9804
1
8
3
0
LSB Data
A
C
K
4
0
5
1
© 2009 Microchip Technology Inc.
6
0
7
0
MCP9804
8
0
A
C
K
P