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DS125BR401 Datasheet(PDF) 36 Page - Texas Instruments

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No. de pieza DS125BR401
Descripción Electrónicos  Low-Power, 12.5-Gbps, 4-Lane Repeater With Input Equalization and Output De-Emphasis
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
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DS125BR401 Datasheet(HTML) 36 Page - Texas Instruments

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DS125BR401
SNLS419D – JULY 2012 – REVISED MAY 2015
www.ti.com
Register Maps (continued)
Table 10. SMBUS Slave Mode Register Map (continued)
Addres
Register Name
Bit
Field
Type Default
EEPROM
Description
s
Bit
0x3A
CH6 - CHA2
7:0
EQ Control
R/W
0x2F
Yes
IA2 EQ Control - total of 256 levels.
EQ
See Table 2.
0x3B
CH6 - CHA2
7
Short Circuit
R/W
0xAD
Yes
1: Enable the short circuit protection
VOD
Protection
0: Disable the short circuit protection
6
MODE_SEL
Yes
1: PCIe Gen-1 or PCIe Gen-2
0: PCIe Gen-3
Note: override the MODE pin.
5:3
Reserved
Yes
Set bits to default value - 101.
2:0
VOD Control
Yes
OA2 VOD Control
000: 0.7 V
001: 0.8 V
010: 0.9 V
011: 1 V
100: 1.1 V
101: 1.2 V (default)
110: 1.3 V
111: 1.4 V
0x3C
CH6 - CHA2
7
RXDET
R
0x02
Observation bit for RXDET CH6 - CHA2.
DEM
STATUS
1: RX = detected
0: RX = not detected
6:5
MODE_DET
R
Observation bit for MODE_DET CH6 - CHA2.
STATUS
00: PCIe Gen-1 (2.5G)
01: PCIe Gen-2 (5G)
11: PCIe Gen-3 (8G+)
Note: Only functions when MODE Pin = Automatic
4:3
Reserved
R/W
Set bits to 0.
2:0
DEM Control
R/W
Yes
OA2 DEM Control
000: 0 dB
001: –1.5 dB
010: –3.5 dB (default)
011: –5 dB
100: –6 dB
101: –8 dB
110: –9 dB
111: –12 dB
0x3D
CH6 - CHA2
7:4
Reserved
R/W
0x00
Set bits to 0.
IDLE Threshold
3:2
IDLE tha
Yes
Assert threshold
00 = 180 mVp-p (default)
01 = 160 mVp-p
10 = 210 mVp-p
11 = 190 mVp-p
Note: override the SD_TH pin.
1:0
IDLE thd
Yes
Deassert threshold
00 = 110 mVp-p (default)
01 = 100 mVp-p
10 = 150 mVp-p
11 = 130 mVp-p
Note: override the SD_TH pin.
0x3E
Reserved
7:0
Reserved
R/W
0x00
Set bits to 0
0x3F
CH7 - CHA3
7:3
Reserved
R/W
0x00
Set bits to 0.
Signal Detect
2
SD Reset
1: Force signal detect "off"
0: Normal operation
1
SD Preset
1: Force signal detect "on"
0: Normal operation
0
Reserved
Set bit to 0.
36
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