Rainbow-electronics DS1621 Manual do Utilizador descarregar pdf (Página 11)

DS1621

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measurement will be completed and the DS1621 will remain idle until a Start Convert T is issued to

resume continuous operation.

DS1621 COMMAND SET Table 3

INSTRUCTION DESCRIPTION PROTOCOL

2-WIRE BUS DATA

AFTER ISSUING

PROTOCOL NOTES

TEMPERATURE CONVERSION COMMANDS

Read Temperature Read last converted temperature

value from temperature register.

AAh <read 2 bytes data>

Read Counter Reads value of count remaining

from counter.

A8h <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

Access TH Reads or writes high

temperature limit value into TH

A1h <write data> 2

Access TL Reads or writes low

temperature limit value into TL

A2h <write data> 2

Access Config Reads or writes configuration

data to configuration register.

ACh <write 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

typically requires 10ms at room temperature. After issuing a write command, no

further writes should be requested for at least 10 ms.

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Rainbow-electronics DS1621 Manual do Utilizador Página 11