ADT7318 데이터 시트보기 (PDF) - Analog Devices

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ADT7318

±0.5°C Accurate Digital Temperature Sensor and Quad Voltage Output 12-/10-/8-Bit DACs

Analog Devices 

REGISTERS

The ADT7316/ADT7317/ADT7318 contain registers that are

used to store the results of external and internal temperature

measurements, VDD value measurements, high and low tem-

perature and supply voltage limits. They also set output DAC

voltage levels, configure multipurpose pins, and generally

control the device. A description of these registers follows.

The register map is divided into registers of 8 bits. Each register

has its own individual address, but some consist of data that is

linked with other registers. These registers hold the 10-bit con-

version results of measurements taken on the temperature and

VDD channels. For example, the 8 MSBs of the VDD measurement

are stored in VDD Value Register MSBs Register (Address 0x06),

while the 2 LSBs are stored in Internal Temperature Value/VDD

Value LSBs Register Address 0x03. These types of registers are

linked in that when the LSB register is read first, the MSB regis-

ters associated with that LSB register are locked out to prevent

any updates. To unlock these MSB registers, the user has only to

read any one of them, which effectively unlocks all previously

locked-out MSB registers. Therefore, for the example given

earlier, if Register 0x03 is read first, MSB Register 0x06 and

Register 0x07 are locked out to prevent any updates to them.

If Register 0x06 is read, then this register and Register 0x07

would be subsequently unlocked.

FIRST READ

COMMAND

LSB

REGISTER

OUTPUT

DATA

LOCK ASSOCIATED

MSB REGISTERS

Figure 46. Phase 1 of 10-Bit Read

SECOND READ

COMMAND

MSB

REGISTER

OUTPUT

DATA

UNLOCK ASSOCIATED

MSB REGISTERS

Figure 47. Phase 2 of 10-Bit Read

If an MSB register is read first, its corresponding LSB register is

not locked out, allowing the user to read back only 8 bits (MSB)

of a 10-bit conversion result. Reading an MSB register first does

not lock out other MSB registers, and likewise, reading an LSB

register first does not lock out other LSB registers.

ADT7316/ADT7317/ADT7318

Table 10. List of ADT7316/ADT7317/ADT7318 Registers

RD/WR

Address

Name

Power-On

Default

0x00

Interrupt Status 1

0x00

0x01

Interrupt Status 2

0x00

0x02

Reserved

0x00

0x03

Internal Temp and VDD LSBs 0x00

0x04

External Temp LSBs

0x00

0x05

Reserved

0x00

0x06

VDD MSBs

0xxx

0x07

Internal Temp MSBs

0x00

0x08

External Temp MSBs

0x00

0x09 to 0x0F Reserved

0x00

0x10

DAC A LSBs

(ADT7316/ADT7317 only)

0x00

0x11

DAC A MSBs

0x00

0x12

DAC B LSBs

(ADT7316/ADT7317 only)

0x00

0x13

DAC B MSBs

0x00

0x14

DAC C LSBs

(ADT7316/ADT7317 only)

0x00

0x15

DAC C MSBs

0x00

0x16

DAC D LSBs

(ADT7316/ADT7317 only)

0x00

0x17

DAC D MSBs

0x00

0x18

Control Configuration 1

0x00

0x19

Control Configuration 2

0x00

0x1A

Control Configuration 3

0x00

0x1B

DAC Configuration

0x00

0x1C

LDAC Configuration

0x00

0x1D

Interrupt Mask 1

0x00

0x1E

Interrupt Mask 2

0x00

0x1F

Internal Temp Offset

0x00

0x20

External Temp Offset

0x00

0x21

Internal Analog Temp Offset 0xD8

0x22

External Analog Temp Offset 0xD8

0x23

VDD VHIGH Limit

0xC7

0x24

VDD VLOW Limit

0x62

0x25

Internal THIGH Limit

0x64

0x26

Internal TLOW Limit

0xC9

0x27

External THIGH Limit

0xFF

0x28

External TLOW Limit

0x00

0x29 to 0x4C Reserved

0x4D

Device ID

0x01/0x09/0x05

0x4E

Manufacturer’s ID

0x41

0x4F

Silicon Revision

0xXx

0x50 to 0x7E Reserved

0x00

0x7F

SPI Lock Status

0x00

0x80 to 0xFF Reserved

0x00

Rev. B | Page 27 of 44

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