DS80PCI402_15 Datasheet, PDF (27/54 Pages) Texas Instruments – 2.5-Gbps / 5.0-Gbps / 8.0-Gbps 4-Lane PCI-Express Repeater With Equalization and De-Emphasis

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DS80PCI402
SNLS324E – APRIL 2011 – REVISED JANUARY 2015
Address Register Name Bit
0x00
Device Address 7
Observation
6:3
0x01
2
1:0
PWDN Channels 7:0
0x02
Override PRSNT, 7
LPBK Control
6
5:4
3:2
1
0
0x03
0x04
0x05
0x06
Reserved
7:0
Reserved
7:0
Reserved
7:0
Slave Register 7:5
Control
4
3
2:0
0x07
Digital Reset
7
Control
6
5:0
Table 9. SMBus Slave Mode Register Map
Field
Reserved
Address Bit
AD[3:0]
Type Default
R/W 0x00
R
EEPROM Read R
Done
Reserved
R/W
PWDN CHx
R/W 0x00
Override
RXDET
RXDET Value
R/W 0x00
LPBK
Control
Reserved
Reserved
Override
PRSNT
pin
Reserved
R/W 0x00
Reserved
R/W 0x00
Reserved
R/W 0x00
Reserved
R/W 0x10
Reserved
Register Enable
Reserved
Reserved
R/W 0x01
Reset Registers
Reserved
EEPROM
Bit
Yes
Yes
Yes
Yes
Description
Set bit to 0
Observation of AD[3:0] bits
[6]: AD3
[5]: AD2
[4]: AD1
[3]: AD0
See Table 6
1: Device completed the read from external
EEPROM
Reserved
Power Down per Channel
[7]: CH7 – CHA_3
[6]: CH6 – CHA_2
[5]: CH5 – CHA_1
[4]: CH4 – CHA_0
[3]: CH3 – CHB_3
[2]: CH2 – CHB_2
[1]: CH1 – CHB_1
[0]: CH0 – CHB_0
0x00 = all channels enabled
0xFF = all channels disabled
Note: override PRSNT pin
1 = Override Automatic Rx Detect State
Machine Reset
1 = Set Rx Detect State Machine Reset
0 = Clear Rx Detect State Machine Reset
00: Use LPBK pin control
01: INA_n to OUTB_n loopback
10: INB_n to OUTA_n loopback
11: Disable loopback and ignore LPBK pin
Set bits to 0
Set bit to 0
1: Block PRSNT pin control
0: Allow PRSNT pin control
Set bits to 0
Yes
Set bits to 0
Set bits to 0
Set bits to 0
Yes
Set bit to 1
1 = Enables SMBus Slave Mode Register
Control
Note: To change VOD, DEM, and EQ of the
channels in slave mode, this bit must be set
to 1.
Set bits to 0
Set bit to 0
Self clearing bit, set to 1 to reset the register to
default values.
Set bits to 000001'b
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