MAX1618 查看數據表（PDF） - Maxim Integrated

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MAX1618

Remote Temperature Sensor with SMBus Serial Interface

Maxim Integrated 

Remote Temperature Sensor

with SMBus Serial Interface

Table 3. Command-Byte Bit Assignments

REGISTER

COMMAND

POR STATE

FUNCTION

RFU

00h

N/A

Reserved for future use

RRTE

01h

0000 0000*

Read remote temperature; returns latest temperature

RSL

02h

N/A

Read status byte (flags, busy signal)

RCL

03h

0000 1000

Read configuration byte

RCRA

04h

0000 0111

Read conversion rate byte (not supported by MAX1618)

RFU

05h

N/A

Reserved for future use

RFU

06h

N/A

Reserved for future use

RRHI

RRLS

WCA

07h

0111 1111

Read remote THIGH limit

08h

1100 1001

Read remote TLOW limit

09h

N/A

Write configuration byte

WCRW

0Ah

N/A

Write conversion rate byte (not supported by MAX1618)

RFU

0Bh

N/A

Reserved for future use

RFU

0Ch

N/A

Reserved for future use

WRHA

0Dh

WRLN

0Eh

OSHT

0Fh

N/A

Write remote THIGH limit

N/A

Write remote TLOW limit

N/A

One-shot command

MFGID

FEh

01001101

Read manufacturer ID code

DEVID

FFh

00000010

Read device ID code

*If the device is in hardware standby mode at POR, the temperature register reads 0°C.

Table 4. Configuration-Byte Bit

Assignments

BIT

7

(MSB)

NAME

MASK

POR

STATE

0

FUNCTION

Masks all ALERT interrupts

when high.

Standby mode control bit. If

high, the device immediately

6

RUN/

STOP

0

stops converting and enters

standby mode. If low, the

device converts in either

one-shot or timer mode.

ALERT pin polarity control in

5

POL

0

thermostat mode.

0 = active low

1 = active high

4

THERM

0

Enables thermostat mode

when high.

Enables diode bias current.

0 (Logic Low) = 5µA to 50µA

3

ID

1

(typ)

1 (Logic High) = 10µA to

100µA (typ)

2 to 0 RFU

0

Reserved for future use.

Table 5. Status-Byte Bit

Assignments

BIT

NAME

FUNCTION

7

(MSB)

BUSY

A high indicates that the ADC is busy

converting.

6, 5

RFU

Reserved for future use (returns 0).

A high indicates that the remote high-

4

RHIGH*

temperature alarm has activated. In

thermostat mode, this bit is always in

the same state as the ALERT output.

A high indicates that the remote low-

3

RLOW*

temperature alarm has activated. In

thermostat mode, this bit is always

zero.

A high indicates a remote-diode fault

2

DIODE (open-circuit, shorted diode, or DXP

short to GND).

1, 0

(LSB)

RFU

Reserved for future use (returns 0).

*In ALERT mode, the HIGH and LOW temperature alarm flags

stay high until cleared by POR or until the status byte register

is read.

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