DS1620

DS1620 COMMAND SET Table 4

INSTRUCTION DESCRIPTION

PROTOCOL

3-WIRE BUS

DATA AFTER

ISSUING

PROTOCOL

NOTES

TEMPERATURE CONVERSION COMMANDS

Read Temperature Reads last converted temperature

value from temperature register.

AAh

<read data>

Read Counter

Reads value of count remaining

from counter.

A0h

<read data>

Read Slope

Reads value of the slope

accumulator.

A9h

<read data>

Start Convert T

Initiates temperature conversion.

EEh

Idle

1

Stop Convert T

Halts temperature conversion.

22h

Idle

1

THERMOSTAT COMMANDS

Write TH

Writes high temperature limit value

into TH register.

01h

<write data>

2

Write TL

Writes low temperature limit value

into TL register.

02h

<write data>

2

Read TH

Reads stored value of high

temperature limit from TH register.

A1h

<read data>

2

Read TL

Reads stored value of low

temperature limit from TL register.

A2h

<read data>

2

Write Config

Writes configuration data to

configuration register.

0Ch

<write data>

2

Read Config

Reads configuration data from

configuration register.

ACh

<read data>

2

NOTES:

1. In continuous conversion mode, a Stop Convert T command will halt continuous conversion. To

restart, the Start Convert T command must be issued. In one–shot mode, a Start Convert T command

must be issued for every temperature reading desired.

writes should be requested for at least 10 ms.

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