EMC1428 datasheet(19/53 Pages) MICROCHIP

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1°C Multiple Temperature Sensor with HW Thermal Shutdown & Hottest of Thermal Zones

Data Sheet

 2014 Microchip Technology Inc.

DS20005275A-page 19

4.4

Consecutive Alerts

The EMC1428 contains multiple consecutive alert counters. One set of counters applies to the ALERT

pin and the second set of counters applies to the SYS_SHDN pin. Each temperature measurement

channel has a separate consecutive alert counter for each of the interrupt conditions (High, Low, Diode

fault). All counters are user programmable and determine the number of consecutive measurements

that a temperature channel(s) must be out-of-limit or reporting a diode fault before the corresponding

status bit is set or pin is asserted.

See Section 5.14 for more details on the consecutive alert function.

4.5

Temperature Monitoring

The EMC1428 can monitor the temperature of up to seven (7) externally connected diodes as well as

the internal or ambient temperature. Each channel is configured with the following features enabled or

disabled based on user settings and system requirements.

APPLICATION NOTE: When measuring a 45nm CPU diode, the reported temperature has an error of approximately

+1.5C at 100°C. This error is related to non-perfect ideality in the CPU diode.

412.0

113

3740.0

453.0

114

4120.0

487.0

115

4530.0

523.0

116

4990.0

562.0

117

5490.0

604.0

118

6040.0

649.0

119

6810.0

698.0

120

7870.0

750.0

121

9090.0

787.0

122

10700.0

845.0

123

12700.0

909.0

124

15800.0

953.0

125

20500.0

1020.0

126

29400.0

1100.0

127

49900.0

1150.0

Open

Table 4.1 VTRIP Resistor Settings (continued)

TEMP (°C)

RSET

()

TEMP (°C)

RSET

()

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