DS2482S-800 Maxim Integrated Products, Inc., DS2482S-800 Datasheet - Page 11

• Manufacturer Part Number: DS2482S-800
• Description: Eight-channel 1-wire Master
• Manufacturer: Maxim Integrated Products, Inc.

Channel Select
Valid Channel Selection Codes
Figure 5. 1-Wire Reset/Presence Detect Cycle
Command Code
Command Parameter
Description
Typical Use
Restriction
Error Response
Command Duration
1-Wire Activity
Read Pointer Position
Status Bits Affected
Configuration Bits Affected
Channel Selection
Channel IO0 (default)
Channel IO1
Channel IO2
Channel IO3
Channel IO4
Channel IO5
Channel IO6
Channel IO7
V
V
V
0V
IH1
CC
IL1
t
F1
Pullup
For presence-pulse masking and pullup details see Figure 3.
RESET PULSE
t
RSTL
C3h
Selection Code
Sets the 1-Wire IO channel for subsequent 1-Wire communication
commands. NOTE: The selection code read back is different from the
code written. See the table below for the respective values.
Selecting a 1-Wire IO channel other that IO0; randomly selecting one of
the available 1-Wire IO channels.
1-Wire activity must have ended before the DS2482 can process this
command.
Command code and parameter will not be acknowledged if 1WB = 1 at the
time the command code is received and the command will be ignored.
If the selection code is not valid, the selection code will not be
acknowledged and the command will be ignored.
None; the channel selection register is updated on the rising SCL edge of
the selection code acknowledge bit.
None
Channel Selection Register (to verify write)
None
None
Code (to be written)
D2h
C3h
F0h
E1h
B4h
A5h
96h
87h
DS2482 Pulldown
t
PRESENCE/SHORT DETECT
SI
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Code (read back)
t
RSTH
t
MSP
AAh
9Ch
B8h
B1h
A3h
8Eh
95h
87h
1-W Slave Pulldown