Rainbow Electronics DS1631 - Manual (Page 10)

DS1631
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DS1631 COMMAND SET
The DS1631 command set is detailed below and is summarized in Table 6.
Start Convert T [ 51h ]
Initiates temperature conversions. If the part is in one-shot mode (1SHOT = 1), only one conversion will
be performed. In continuous mode (1SHOT = 0), continuous temperature conversions will be performed
until a Stop Convert T command is issued.
Stop Convert T [ 22h ]
Stops temperature conversions when the device is in continuous conversion mode (1SHOT = 0).
Read Temperature [ AAh ]
Reads last converted temperature value from the 2-byte temperature register.
Access TH [ A1h ]
Reads or writes the 2-byte T
H
register.
Access TL [ A2h ]
Reads or writes the 2-byte T
L
register.
Access Config [ ACh ]
Reads or writes the 1-byte configuration register.
Software POR [ 54h ]
Initiates a software power-on reset (POR).
DS1631 COMMAND SET Table 6
Command Description Protocol
2-Wire Bus Activity
After Command is
Issued
Notes
TEMPERATURE
Start Convert T Initiates temperature
conversions. 51h Idle
Stop Convert T Halts temperature conversions. 22h Idle
Read
Temperature Reads last converted
temperature value from
temperature register. AAh Two data bytes are
transmitted by the
DS1631. 1
THERMOSTAT
Access TH Reads or writes the T
H
register. A1h Two data bytes are
transmitted. 2, 3
Access TL Reads or writes the T
L
register. A2h Two data bytes are
transmitted. 2, 3
Access Config Reads or writes the
configuration register. ACh One data byte is
transmitted. 2, 3
OTHER
Software POR Initiates a software power-on
reset. 54h Idle