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DS1621
 
12 of 16
MEMORY FUNCTION EXAMPLE
Example: Bus master sets up DS1621 for continuous conversion and thermostatic function.
 
BUS MASTER
MODE
DS1621
MODE
DATA (MSB
FIRST)
 
COMMENTS
TX
RX
START
Bus Master initiates a START condition.
TX
RX
<address,0>
Bus Master sends DS1621 address; R/
W  = 0. 
RX
TX
ACK
DS1621 generates acknowledge bit.
TX
RX
ACh
Bus Master sends Access Config command protocol.
RX
TX
ACK
DS1621 generates acknowledge bit.
TX
RX
02h
Bus Master sets up DS1621 for output polarity active
high, continuous conversion.
RX
TX
ACK
DS1621 generates acknowledge bit.
TX
RX
START
Bus Master generates a repeated START condition.
TX
RX
<address,0>
Bus Master sends DS1621 address; R/
W  = 0. 
RX
TX
ACK
DS1621 generates acknowledge bit.
TX
RX
A1h
Bus Master sends Access TH command.
RX
TX
ACK
DS1621 generates acknowledge bit.
TX
RX
28h
Bus Master sends first byte of data for TH limit of
+40癈.
RX
TX
ACK
DS1621 generates acknowledge bit.
TX
RX
00h
Bus Master sends second byte of data for TH limit of
+40癈.
RX
TX
ACK
DS1621 generates acknowledge bit.
TX
RX
START
Bus Master generates a repeated START condition.
TX
RX
<address,0>
Bus Master sends DS1621 address; R/
W  = 0. 
RX
TX
ACK
DS1621 generates acknowledge bit.
TX
RX
A2h
Bus Master sends Access TL command.
RX
TX
ACK
DS1621 generates acknowledge bit.
TX
RX
0Ah
Bus Master sends first byte of data for TL limit of
+10癈.
RX
TX
ACK
DS1621 generates acknowledge bit.
TX
RX
00h
Bus Master sends second byte of data for TL limit of
+10癈.
RX
TX
ACK
DS1621 generates acknowledge bit.
TX
RX
START
Bus Master generates a repeated START condition.
TX
RX
<address,0>
Bus Master sends DS1621 address; R/
W  = 0. 
RX
TX
ACK
DS1621 generates acknowledge bit.
TX
RX
EEh
Bus Master sends Start Convert T command protocol.
RX
TX
ACK
DS1621 generates acknowledge bit.
TX
RX
STOP
Bus Master initiates STOP condition.
 
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