EMC1413 datasheet(31/52 Pages) SMSC

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Multiple Channel 1°C Temperature Sensors with Beta Compensation

Datasheet

SMSC EMC1413 / EMC1414

Revision 1.41 (02-23-12)

DATASHEET

Bit 4 - RECD1 - Disables the Resistance Error Correction (REC) for External Diode 1.

‘0’ (default) - REC is enabled for External Diode 1.

‘1’ - REC is disabled for External Diode 1.

Bit 3 - RECD2 - Disables the Resistance Error Correction (REC) for External Diode 2 and External

Diode 3.

‘0’ (default) - REC is enabled for External Diode 2 and External Diode 3.

‘1’ - REC is disabled for External Diode 2 and External Diode 3.

Bit 2 - RANGE - Configures the measurement range and data format of the temperature channels.

‘0’ (default) - The temperature measurement range is 0°C to +127.875°C and the data format is

binary.

‘1’ -The temperature measurement range is -64°C to +191.875°C and the data format is offset

binary (see Table 6.2).

Bit 1 - DAVG_DIS - Disables the dynamic averaging feature on all temperature channels.

‘0’ (default) - The dynamic averaging feature is enabled. All temperature channels will be converted

with an averaging factor that is based on the conversion rate as shown in Table 6.1.

‘1’ - The dynamic averaging feature is disabled. All temperature channels will be converted with a

maximum averaging factor of 1x (equivalent to 11-bit conversion). For higher conversion rates, this

averaging factor will be reduced as shown in Table 6.1.

Bit 0 - APDD (EMC1414 only) - Disables the anti-parallel diode operation. Beta Compensation is

disabled on External Diode 2 and 3 regardless of APDD setting. In addition, External Diode 2 Beta

Configuration register will be ignored.

‘0’ (default) - Anti-parallel diode mode is enabled. Two external diodes will be measured on the

DP2 and DN2 pins.

‘1’ - Anti-parallel diode mode is disabled. Only one external diode will be measured on the DP2

and DN2 pins.

7.5

Conversion Rate Register

The Conversion Rate Register controls how often the temperature measurement channels are updated

and compared against the limits. This register is fully accessible at either address.

Bits 3-0 - CONV[3:0] - Determines the conversion rate as shown in Table 7.6.

Table 7.5 Conversion Rate Register

ADDR

R/W

DEFAULT

04h

R/W

Conversion

Rate

CONV[3:0]

06h

(4/sec)

0Ah

Table 7.6 Conversion Rate

CONV[3:0]

CONVERSIONS / SECOND

HEX

1 / 16

1 / 8

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