Rainbow-electronics MAX1619 Bedienungsanleitung PDF herunterladen (Seite 13)

MAX1619

Remote/Local Temperature Sensor with Dual-

Alarm Outputs and SMBus Serial Interface

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Table 4. Command-Byte Bit Assignments

If the device is in hardware standby mode at POR, both temperature registers read 0°C.

Read remote temperature: returns latest temperatureRRTE 01h

00h

COMMAND

0000 0000*

POR STATE

Read configuration byteRCL 03h

02h

0000 1100

N/A Read status byte (flags, busy signal)RSL

Read remote T

MAX

limitRRTM 10h

Read local temperature: returns latest temperatureRLTS

04h

01100100

0000 0010

Read remote T

HIGH

limitRRHI 07h

11h

0111 1111

01011111 Read remote T

HYST

limitRRTH

Read conversion rate byte

RCRA

Write configuration byteWCA 09h

08h

N/A

1100 1001

FUNCTION

Write remote T

MAX

limitWRTM 12h

0Ah

N/A

N/A Write conversion rate byteWCRW

Write remote T

HIGH

limitWRHA 0Dh

Read remote T

LOW

limitRRLS

13h

N/A

One-shot command OSHT 0Fh

0Eh

N/A

N/A Write remote T

LOW

limitWRLN

Write remote T

HYST

limitWRTH

RUN/

STOP

6 0

POR STATE

Standby mode control bit. If high, the device immediately stops converting and

enters standby mode. If low, the device converts in either one-shot or timer

mode.

Masks all ALERT interrupts when high.

FUNCTION

POL5 0

Determines the polarity of the OVERT output:

0 = active low (low when overtemp)

1 = active high

MASK7 (MSB)

BIT NAME

Table 5. Configuration-Byte Bit Assignments

Write addressWADD FDh

FCh

N/A

Read device ID codeDEV ID FFh

FEh

0000 0100

0100 1101 Read manufacturer ID codeMFG ID

Write software PORSPOR

PROT4 0

When asserted high, locks out all subsequent writes to:

[] Configuration register bits 6, 5, 4, 3, 2 (RUN/STOP, POL, PROT, ID1, ID2)

[] T

MAX

[] T

HYST

[] Conversion rate register

[] Diode Current

ID13 1 Reduces the diode current by 5µA when set low.

ID22 1 Reduces the diode current by 2.5µA when set low.

RFU1–0 0 Reserved for future use.

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 19 20

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