Data Sheet

ADT7312

| Page 15 of 24

TEMPERATURE VALUE REGISTER

The 16-bit, read-only temperature value register (Register

Address 0x02) stores the temperature measured by the internal

temperature sensor. The temperature is stored as a 16-bit, twos

complement value. The temperature is read back from the

temperature value register as a 16-bit value.

When the ADC is configured to convert the temperature to

temperature to a 16-bit digital value, Bits[2:0] are the LSBs of

the extended digital value. To configure the ADC for 13-bit

or 16-bit resolution, write to Bit 7 of the configuration register

(Register Address 0x01).

ID REGISTER

The 8-bit, read-only ID register (Register Address 0x03) stores the

manufacturer ID in Bits[7:3] and the silicon revision in Bits[2:0].

Address 0x04) stores the critical overtemperature limit value.

A critical overtemperature event occurs when the temperature

value stored in the temperature value register exceeds the value

stored in this register. The CT pin is activated if a critical over-

temperature event occurs. The temperature is stored in twos

complement format; the MSB is the temperature sign bit.

Table 10. Temperature Value Register (Register Address 0x02)

Bits

Default Value

Type

Name

Description

15

0

R

Sign

Sign bit. Indicates whether the temperature value is negative or positive

(0 = positive, 1 = negative).

[14:8]

0000000

R

Temp

Temperature value (Bits[14:8]) in twos complement format.

[7:3]

00000

R

Temp

Temperature value (Bits[7:3]) in twos complement format.

2

0

R

If the part is configured for 13-bit resolution (Register Address 0x01, Bit 7 = 0), this

bit flags a critical overtemperature event. When the temperature value exceeds

Address 0x01, Bit 7 = 1), this bit is LSB 2 of the 15-bit temperature value.

1

0

R

If the part is configured for 13-bit resolution (Register Address 0x01, Bit 7 = 0), this

this bit is set to 1. If the part is configured for 16-bit resolution (Register Address

0x01, Bit 7 = 1), this bit is LSB 1 of the 15-bit temperature value.

0

0

R

If the part is configured for 13-bit resolution (Register Address 0x01, Bit 7 = 0), this

bit flags an undertemperature event. When the temperature value falls below

Address 0x01, Bit 7 = 1), this bit is LSB 0 of the 15-bit temperature value.

Table 11. ID Register (Register Address 0x03)

Bits

Default Value

Type

Name

Description

[7:3]

11000

R

Manufacturer ID

Contains the manufacturer identification number.

[2:0]

011

R

Revision ID

Contains the silicon revision identification number.

Bits

Default Value

Type

Name

Description

[15:0]

0x4980

R/W

16-bit critical overtemperature limit, stored in twos complement format. The

default setting is +147°C.

Rev. A