DS80PCI402_15 Datasheet, PDF (31/54 Pages) Texas Instruments – 2.5-Gbps / 5.0-Gbps / 8.0-Gbps 4-Lane PCI-Express Repeater With Equalization and De-Emphasis

www.ti.com
DS80PCI402
SNLS324E – APRIL 2011 – REVISED JANUARY 2015
Address Register Name
0x19
CH1 - CHB_1
IDLE Threshold
0x1A
0x1B
0x1C
Reserved
Reserved
CH2 - CHB_2
IDLE, RXDET
0x1D
0x1E
CH2 - CHB_2
EQ
CH2 - CHB_2
VOD
Table 9. SMBus Slave Mode Register Map (continued)
Bit Field
7
Reserved
6:4 Reserved
3:2 IDLE tha
1:0 IDLE thd
7:0 Reserved
7:0 Reserved
7:6 Reserved
5
IDLE_AUTO
4
IDLE_SEL
3:2 RXDET
1:0 Reserved
7:0 EQ Control
7
Short Circuit
Protection
6
RATE_SEL
5:3 Reserved
2:0 VOD Control
Type Default
R/W 0x00
R/W 0x00
R/W 0x00
R/W 0x00
R/W 0x2F
R/W 0xAD
EEPROM
Bit
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Description
Set bit to 0.
Set bits to 0.
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
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
Set bits to 0
Set bits to 0
Set bits to 0
1 = Allow IDLE_SEL control in bit 4
0 = Automatic IDLE detect
Note: Override IDLE control
1: Output is MUTED (electrical idle)
0: Output is ON
Note: Override IDLE control
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;
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
Set bits to 0
INB_2 EQ Control - total of 256 levels.
See Table 2
1: Enable the short circuit protection
0: Disable the short circuit protection
1: Gen 1/2
0: Gen 3
Note: Override the RATE pin
Set bits to default value - 101
OUTB_2 VOD Control
000: 0.7 V
001: 0.8 V
010: 0.9 V
011: 1.0 V
100: 1.1 V
101: 1.2 V (default)
110: 1.3 V
111: 1.4 V
Copyright © 2011–2015, Texas Instruments Incorporated
Product Folder Links: DS80PCI402
Submit Documentation Feedback
31