USB Hub with Integrated 10/100 Ethernet Controller

Datasheet

Chapter 1 Introduction

1.1Block Diagram

LAN9512

JTAG

TAP

 

 

EEPROM

 

Controller
USB 2.0
10/100

Controller

 

 

Ethernet

 

 

 

Hub

 

USB

Upstream

Controller

Ethernet

DP/DM

 

 

USB PHY

 

 

PHY

EEPROM

Ethernet

Downstream

Downstream

USB PHY

USB PHY

USB

USB

DP/DM

DP/DM

Figure 1.1 Internal Block Diagram

1.1.1Overview

The LAN9512 is a high performance Hi-Speed USB 2.0 hub with a 10/100 Ethernet controller. With applications ranging from embedded systems, desktop PCs, notebook PCs, printers, game consoles, and docking stations, the LAN9512 is targeted as a high performance, low cost USB/Ethernet and USB/USB connectivity solution.

The LAN9512 contains an integrated USB 2.0 hub, two integrated downstream USB 2.0 PHYs, an integrated upstream USB 2.0 PHY, a 10/100 Ethernet PHY, a 10/100 Ethernet Controller, a TAP controller, and a EEPROM controller. A block diagram of the LAN9512 is provided in Figure 1.1.

The LAN9512 hub provides over 30 programmable features, including:

PortMap (also referred to as port remap) which provides flexible port mapping and disabling sequences. The downstream ports of the LAN9512 hub can be reordered or disabled in any sequence to support multiple platform designs’ with minimum effort. For any port that is disabled, the LAN9512 automatically reorders the remaining ports to match the USB host controller’s port numbering scheme.

PortSwap which adds per-port programmability to USB differential-pair pin locations. PortSwap allows direct alignment of USB signals (D+/D-) to connectors avoiding uneven trace length or crossing of the USB differential signals on the PCB.

PHYBoost which enables four programmable levels of USB signal drive strength in USB port transceivers. PHYBoost attempts to restore USB signal integrity that has been compromised by system level variables such as poor PCB layout, long cables, etc..

Revision 1.0 (04-20-09)

6

SMSC LAN9512

 

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