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DS2407 Datasheet(PDF) 23 Page - Dallas Semiconductor

Part # DS2407
Description  Dual Addressable Switch Plus 1K.Bit Memory
PDF  31 Pages
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Manufacturer  DALLAS [Dallas Semiconductor]
Direct Link  https://www.maximintegrated.com/en.html
Logo DALLAS - Dallas Semiconductor

DS2407 Datasheet(HTML) 23 Page - Dallas Semiconductor

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channel B. The bus master can determine the availabil-
ity of channel B from bit 6 of the Channel Info byte.
The power–on default settings for the conditional
search become valid after the device has received any
ROM function command byte, even an invalid one, and
can be modified by writing to the appropriate Status
Memory location. As long as the device remains pow-
ered up, the modified search conditions are available for
use at any time.
QUALIFYING CONDITIONS FOR CONDITIONAL SEARCH Figure 13
DESCRIPTION
CONDITIONAL SEARCH SELECT CODE
CONDITION
CHANNEL
CHANNEL SELECT
SOURCE SELECT
POLARITY
CONDITION
CHANNEL
CSS4
CSS3
CSS2
CSS1
CSS0
Hidden Mode
neither one
don’t care
0
0
1
Unconditional
neither one
0
0
at least one of these bits
needs to be 1
0
Activity Latch = 0
A
0
1
0
1
0
Activity Latch = 1
A
0
1
0
1
1
Channel FF = 0
(transistor on)
A
0
1
1
0
0
Channel FF = 1
(transistor off)
A
0
1
1
0
1
PIO Low
A
0
1
1
1
0
PIO High
A
0
1
1
1
1
Activity Latch = 0
B
1
0
0
1
0
Activity Latch = 1
B
1
0
0
1
1
Channel FF = 0
(transistor on)
B
1
0
1
0
0
Channel FF = 1
(transistor off)
B
1
0
1
0
1
PIO Low
B
1
0
1
1
0
PIO High
B
1
0
1
1
1
Activity Latch = 0
A or B
1
1
0
1
0
Activity Latch = 1
A or B
1
1
0
1
1
Channel FF = 0
(transistor on)
A or B
1
1
1
0
0
Channel FF = 1
(transistor off)
A or B
1
1
1
0
1
PIO Low
A or B
1
1
1
1
0
PIO High
A or B
1
1
1
1
1



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