USB2513B-AEZC View Datasheet(PDF) - SMSC -> Microchip

Part Name

Description

MFG CO.

USB2513B-AEZC

USB 2.0 Hi-Speed Hub Controller

SMSC -> Microchip 

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USB 2.0 Hi-Speed Hub Controller

Datasheet

3.3.1.3

LED

If a strap pin’s buffer type is I/O and shares functionality with an LED, the hardware configuration

outlined below must be implemented. The internal logic will drive the LED appropriately (active high or

low) depending on the sampled strap option. Use the Strap High configuration to set the strap option

value to 1 and Strap Low to set the strap option to 0.

Strap Pin

HUB

+V

R

LED/

kΩ

Strap High

Strap Pin

R

HUB

kΩ

LED/

Strap Low

3.4

Figure 3.6 LED Pin Strap Example

Buffer Type Descriptions

Table 3.5 Buffer Type Descriptions

BUFFER TYPE

DESCRIPTION

I

I/O

IPD

IPU

IS

O12

I/O12

I/OSD12

ICLKx

OCLKx

I-R

I/O-U

Input

Input/output

Input with internal weak pull-down resistor

Input with internal weak pull-up resistor

Input with Schmitt trigger

Output 12 mA

Input/output buffer with 12 mA sink and 12 mA source

Open drain with Schmitt trigger and 12 mA sink. Meets the I2C-Bus

Specification [2] requirements.

XTAL clock input

XTAL clock output

RBIAS

Analog input/output defined in USB specification

SMSC USB251xB/xBi

23

DATASHEET

Revision 2.2 (02-17-12)

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