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DS2434 Datasheet

  • DS2434

  • Battery Identification Chip

  • 823.23KB

  • Dallas   Dallas

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DS2434
MEMORY FUNCTION EXAMPLE
Table 2
Example: Bus Master writes 24 bytes of data to DS2434 scratchpad, then copies to it to NV1.
MASTER MODE
DATA (LSB FIRST)
COMMENTS
TX
Reset
Reset pulse (480-960
碌s)
RX
Presence
Presence pulse
TX
17h
Issue "write scratchpad" command
TX
00h
Start address
TX
<24 bytes>
Write 24 bytes of data to scratchpad
TX
Reset
Reset pulse
RX
Presence
Presence pulse
TX
11h
Issue "read scratchpad" command
TX
00h
Start address
RX
<24 data bytes>
Read scratchpad data and verify
TX
Reset
Reset pulse
RX
Presence
Presence pulse
TX
22h
Issue "copy SP1 to NV1" command
RX
<busy indicator>
Wait until NVB in status register=0 (10 ms typical)
TX
Reset
Reset pulse
RX
Presence
Presence pulse, done
MEMORY FUNCTION EXAMPLE
Table 3
Example: Bus Master initiates temperature conversion, then reads temperature.
MASTER MODE
DATA (LSB FIRST)
COMMENTS
TX
Reset
Reset pulse (480-960
碌s)
RX
Presence
Presence pulse
TX
D2h
Issue "convert T" command
TX
Reset
Reset pulse
RX
Presence
Presence pulse
TX
B2h
Issue "read registers" command; begin loop
TX
62h
Status register address
RX
<1 data byte>
Read status register and loop until TB=0
TX
Reset
Reset pulse
RX
Presence
Presence pulse
TX
B2h
Issue "read registers" command
TX
61h
Temperature register address
RX
<1 data byte>
Read temperature register
TX
Reset
Reset pulse
RX
Presence
Presence pulse, done
1-WIRE BUS SYSTEM
The DS2434 1-Wire bus is a system which has a single bus master and one slave. The DS2434 behaves as
a slave. The DS2434 is not able to be multidropped, unlike other 1-Wire devices from Dallas
Semiconductor.
The discussion of this bus system is broken down into three topics: hardware configuration, transaction
sequence, and 1-Wire signaling (signal types and timing).
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DS2434 产品属性

  • Maxim Integrated Products

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