During Power on Reset (POR), the default values are stored in the registers. A POR is initiated when power is first applied to the part and the voltage

on the VDD supply surpasses the POR level as specified in the electrical characteristics. Any reads to undefined registers will return 00h. Writes to

undefined registers will not have an effect.

The EMC1053 uses an interlock mechanism that will update the Low byte of a particular monitor when the High Byte is read. This prevents changes

in register content when the ADC updates between successive reads.

4.1

Legacy Temperature Data Registers (00h, 23h, 01h, 10h, F8h, F9h)

As shown in Table 4.1, each temperature monitor has two data registers. The 11 bit temperature data is stored aligned to the left resulting in the High

Byte containing temperature in 1°C steps and the Low Byte containing fractions of a degree.

4.2

Extended Format Temperature Registers (FAh-FDh)

The Extended Format Temperature Registers store only the external diode temperatures in the extended data format. This is because, due to the

operating range limitations of the EMC1053, the internal temperature could not benefit from the extended temperature range. Like the Legacy data

formatting, the data is stored in two registers per temperature channel.

2Ah

2Ah

R/W

External Diode 2 Beta

Configuration

BCF2

-

-

-

-

-

BETA<2:0>

07h

EDh

EDh

R

Product ID

PID

0

0

1

1

1

1

0

0

3Ch (-1)

0

0

1

1

1

1

0

1

3Dh (-2)

0

0

1

1

1

1

1

0

3Eh (-3)

0

0

1

1

1

1

1

1

3Fh (-4)

FEh

FEh

R

Manufacturer ID

SMSC

0

1

0

1

1

1

0

1

5Dh

FFh

FFh

R

Revision Register

REV

-

-

-

-

0

0

0

1

01h

Table 4.1 EMC1053 Register Set (continued)

REGISTER

ADDRESS

R/W

REGISTER NAME

SYMBOL

B7

B6

B5

B4

B3

B2

B1

B0

DEFAULT

VALUE

READ

WRITE