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DS620 Digital Thermometer and Thermostat
 
 
 
15 of 15
RX
TX
ACK
DS620 generates acknowledge.
17
TX
RX
START
Bus master generates a repeated start condition.
18
TX
RX
<address, 0>
Bus master sends DS620 address, R/W = 0.
19
RX
TX
ACK
DS620 generates acknowledge.
20
TX
RX
22h
Bus master sends STOP CONVERT command to
stop the DS620 from continuously converting
temperature. NOTE: Bus master should ensure that
EEPROM copy operation is complete before
executing the STOP CONVERT command by either
waiting 10ms from the time of the COPY DATA
command or checking the NVB bit in configuration
register
21
RX
TX
ACK
DS620 generates acknowledge.
22
TX
RX
STOP
Bus master sends STOP condition to end
communication with DS620. (The bus master could
send a repeated start condition if additional
communication with the DS620 is desired.)
23
 
 
Configuring from 1SHOT to mode to continuous conversion mode.
 
BUS
MASTER
MODE
DS620
MODE
DATA
(MSB
FIRST) 
COMMENTS
SEQUENCE
NUMBER
TX
RX
START
Bus master initiates a START condition.
1
TX
RX
<address, 0>
Bus master sends DS620 address, R/W = 0.
2
RX
TX
ACK
DS620 generates acknowledge bit.
3
TX
RX
ACh
Bus master sends the address location of the MSb of
the configuration register (contains the 1SHOT bit).
This writes to the SRAM location corresponding the
EEPROM location.
4
RX
TX
ACK
DS620 generates acknowledge.
5
TX
RX
xxxxxxx0b
Bus master writes to the configuration register putting
the DS620 in continuous conversion mode: 1SHOT =
0.
6
RX
TX
ACK
DS620 generates acknowledge.
7
TX
RX
START
Bus master generates a repeated start condition.
8
TX
RX
<address, 0>   Bus master sends DS620 address, R/W = 0.
9
RX
TX
ACK
DS620 generates acknowledge.
10
TX
RX
51h
Master sends START CONVERT command to DS620
to start temperature conversions.
11
RX
TX
ACK
DS620 generates acknowledge bit and begins
conversions.
12
TX
RX
START
Bus master generates a repeated start condition.
13
TX
RX
<address, 0>   Bus master sends DS620 address, R/W = 0.
14
RX
TX
ACK
DS620 generates acknowledge.
15
TX
RX
48h
Master sends COPY DATA command to DS620 to
copy data in from SRAM memory to EEPROM
memory.
16
RX
TX
ACK
DS620 generates acknowledge.
17
TX
RX
STOP
Bus master sends STOP condition to end
communication with DS620. (The bus master could
send a repeated start condition if additional
communication with the DS620 is desired.)
18
 
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