USB2422SLASHMJ datasheet(15/51 Pages) SMSC

tên linh kiện	USB2422/MJ

Giải thích chi tiết về linh kiện	2-Port USB 2.0 Hi-Speed Hub Controller

PDF	51 Pages

Scroll/Zoom	100%

nhà sản xuất	SMSC [SMSC Corporation]

Trang chủ	http://www.smsc.com

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15 / 51 page

2-Port USB 2.0 Hi-Speed Hub Controller

Datasheet

SMSC USB2422

Revision 1.0 (06-04-13)

DATASHEET

2.5.2

Internal Pull-Down (IPD)

If a strap pin’s buffer type is IPD, one of the two hardware configurations outlined in Figure 2.3 must

be implemented. Use the Strap High configuration to set the strap option value to 1 and Strap Low to

set the strap option value to 0.

Figure 2.3 IPD Pin Strap Example

2.5.3

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.

Figure 2.4 LED Pin Strap Example

HUB

IPD Strap Pin

Strap High

R k

VSS

IPD Strap Pin

Strap Low

VSS

HUB

Strap Pin

LED/

Strap High

HUB

Strap Pin

LED/

Strap Low

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