DS80PCI102_15 Datasheet, PDF (12/46 Pages) Texas Instruments – 2.5-Gbps / 5.0-Gbps / 8.0-Gbps 1-Lane PCI-Express Repeater With Equalization and De-Emphasis

DS80PCI102
SNLS344G – JULY 2011 – REVISED AUGUST 2015
7 Detailed Description
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7.1 Overview
The DS80PCI102 provides input CTLE and output De-emphasis equalization for lossy printed circuit board trace
and cables. The DS80PCI102 operates in three modes: Pin Control Mode configuration (ENSMB = 0), SMBus
Slave Mode (ENSMB = 1) for register configurations from host controller or SMBus Master Mode (ENSMB =
Float) for loading the register configurations from an external EEPROM.
7.2 Functional Block Diagram
B Channel
INB+
INB-
EQ
Term
Rate Signal
Detect Detect
Driver
Rx
Detect
OUTB+
OUTB-
VOD_SEL
EQB[1:0]
DEMB
RXDET
RATE
READEN
PRSNT
SCL
SDA
AD[3:0]
ENSMB
EQA[1:0]
DEMA
INA+
INA-
Digital Core and SMBus Registers
Internal
3.3 V to 2.5 V
Regulator
DONE
VDD (x2)
VIN
VDD_SEL
Term Rate Signal
Detect Detect
EQ
Rx
Detect
Driver
OUTA+
OUTA-
A Channel
Note: This diagram is representative of device signal flow
only; Channels A and B are bi-directional channels.
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