DS1720

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DS1720 COMMAND SET Table 3

INSTRUCTION

DESCRIPTION

PROTOCOL

3-WIRE BUS

DATA AFTER

ISSUING

PROTOCOL

NOTES

TEMPERATURE CONVERSION COMMANDS

Read Temperature

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

Writes high temperature limit

01h

<write data>

2

Writes low temperature limit value

02h

<write data>

2

Reads stored value of high

A1h

<read data>

2

Reads stored value of low

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.

2. Writing to the E

further writes should be requested for at least 10 ms.