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DS10CP154A Datasheet(PDF) 10 Page - Texas Instruments

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Part # DS10CP154A
Description  DS10CP154A 1.5 Gbps 4x4 LVDS Crosspoint Switch
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
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DS10CP154A Datasheet(HTML) 10 Page - Texas Instruments

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SDA
SCL
SMBus
Interface
EN_smb
4
Switch
Configuration
Register
LOS
Register
Control
Register
DS10CP154A
SNLS306C – AUGUST 2008 – REVISED APRIL 2013
www.ti.com
Reading From a Register
To read a register, the following protocol is used (see SMBus 2.0 specification):
1) The Host drives a START condition, the 7-bit SMBus address, and a “0” indicating a WRITE.
2) The Device (Slave) drives an ACK bit (“0”).
3) The Host drives the 8-bit Register Address.
4) The Device drives an ACK bit (“0”).
5) The Host drives a START condition.
6) The Host drives the 7-bit SMBus Address, and a “1” indicating a READ.
7) The Device drives an ACK bit “0”.
8) The Device drives the 8-bit data value (register contents).
9) The Host drives a NACK bit “1” indicating end of READ transfer.
10) The Host drives a STOP condition.
The READ transaction is completed, the bus goes Idle and communication with other SMBus devices may now
occur.
REGISTER DESCRIPTIONS
There are three data registers in the DS10CP154A accessible via the SMBus interface.
Table 6. DS10CP154A SMBus Data Registers
Address
Name
Access
Description
(hex)
0
Switch Configuration
R/W
Switch Configuration Register
3
Control
R/W
Powerdown, LOS Enable and Pin Control Register
4
LOS
RO
Loss Of Signal (LOS) Reporting Register
Switch Configuration Register
The Switch Configuration register is utilized to configure the switch. The following two tables show the Switch
Configuration Register mapping and associated truth table.
Bit
Default
Bit Name
Access
Description
D[1:0]
00
Input Select 0
R/W
Selects which input is routed to the OUT0.
D[3:2]
00
Input Select 1
R/W
Selects which input is routed to the OUT1.
D[5:4]
00
Input Select 2
R/W
Selects which input is routed to the OUT2.
D[7:6]
00
Input Select 3
R/W
Selects which input is routed to the OUT3.
10
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