DS50PCI402_15 Datasheet, PDF (28/38 Pages) Texas Instruments – DS50PCI402 2.5 Gbps / 5.0 Gbps 4 Lane PCI Express Repeater with Equalization and De-Emphasis

DS50PCI402
SNLS320H – APRIL 2010 – REVISED MARCH 2013
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CH7 - CHA3
DE Control
CH7 - CHA3
IDLE Threshold
Global VOD Adjust
Table 10. SMBus Register Map (continued)
7:0 CH7 OA3 DEM
7:4 Reserved
3:0 IDLE threshold
7:2 Reserved
1:0 VOD Adjust
R/W 0x03
R/W 0x00
R/W 0x02
OA3 DEM Control
[7]: DEM TYPE (Compatibility = 0 / Enhanced = 1)
[6:0]: DEM Level Control
Pin [DEM1 DEM0] = Register [TYPE] [Level Control]
= Hex Value
00 = 00000001 = 01'h = 0.0 dB
01 = 11101000 = E8'h = −3.5 dB
11 = 10001000 = 88'h = −6.0 dB
0F = 10010000 = 90'h = −9.0 dB
1F = 10100000 = A0'h = −12.0 dB
F0 = 10010000 = 90'h = −9.0 dB
F1 = 10100000 = A0'h = −12.0 dB
FF = 11000000 = C0'h = Reserved
Set bits to 0.
De-assert = [3:2], assert = [1:0]
00 = 110 mV, 70 mV (Default)
01 = 150 mV, 110 mV
10 = 170 mV, 130 mV
11 = 190 mV, 150 mV
Set bits to 0.
00 = -25.0%
01 = -12.5%
10 = +0.0% (Default)
11 = +12.5%
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