DS80PCI102_15 Datasheet, PDF (31/46 Pages) Texas Instruments – 2.5-Gbps / 5.0-Gbps / 8.0-Gbps 1-Lane PCI-Express Repeater With Equalization and De-Emphasis

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DS80PCI102
SNLS344G – JULY 2011 – REVISED AUGUST 2015
Table 10. SMBus Register Map (continued)
Address
Register
Name
Bit
Field
7:6 Reserved
5:4 Reserved
0x15
CH B
RXDET
Control
3:2 RXDET
0x16
0x17
CH B
EQ Control
CH B
RATE
Control
1:0 Reserved
7:0 BOOST [7:0]
7
Sel_scp
6
Sel_RATE
5:3 Reserved
2:0 Reserved
7
Reserved
6:5 Rate Information
0x18
4:3
CH B
DEM Control
Reserved
2:0 DEM [2:0]
7
Reserved
6:4 Reserved
0x19
CH B
Idle
Threshold
3:2 idle_thA[1:0]
1:0 idle_thD[1:0]
0x1A-0x1B Reserved
0x1C Reserved
0x1D
0x1E
Reserved
Reserved
7:0 Reserved
7:6 Reserved
5:2 Reserved
1:0 Reserved
7:0 Reserved
7:0 Reserved
Type
R/W
R/W
R/W
R
R/W
R/W
R/W
R/W
R/W
R/W
Default
0x00
0x2F
0xED
0x02
0x00
0x00
0x00
0x2F
0xAD
EEPROM
Bit
Description
Reserved
Yes Reserved
00: Input is hi-Z impedance
01: Auto RX-Detect,
outputs test every 12 ms for 600 ms (50 times)
then stops; termination is hi-Z until detection;
Yes
once detected input termination is 50 Ω
10: Auto RX-Detect,
outputs test every 12 ms until detection occurs;
termination is hi-Z until detection; once
detected input termination is 50 Ω
11: Input is 50 Ω Note: override RXDET pin.
Reserved
Yes
EQ Control - total of 256 levels
See Table 2
Yes
1 = Short Circuit Protection ON
0 = Short Circuit Protection OFF
Yes
1 = Select GEN1/2 Mode
0 = Select GEN3 Mode
Yes Reserved
Yes Reserved
Reserved
Signal Rate Detected
00 = GEN1 (2.5G)
01 = GEN2 (5.0G)
11 = GEN3 (8.0G)
Reserved
DEM Control
000: 0 dB
001: –1.5 dB
010: –3.5 dB (default)
Yes 011: –5 dB
100: –6 dB
101: –8 dB
110: –9 dB
111: –12 dB
Yes Reserved
Reserved
Assert Thresholds
Use only if register 0x08 [6] = 1
Yes
00 = 180 mV (Default)
01 = 160 mV
10 = 210 mV
11= 190 mV
Deassert Thresholds
Use only if register 0x08 [6] = 1
Yes
00 = 110 mV (Default)
01 = 100 mV
10 = 150 mV
11= 130 mV
Reserved
Reserved
Yes Reserved
Reserved
Yes Reserved
Yes Reserved
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