USB2412 Просмотр технического описания (PDF) - SMSC -> Microchip

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USB2412

2-Port USB 2.0 Hi-Speed Hub Controller

SMSC -> Microchip 

Chapter 2 Pin Descriptions

2-Port USB 2.0 Hi-Speed Hub Controller

Datasheet

2.1

This chapter is organized by a set of pin configurations followed by a corresponding pin list organized

by function according to their associated interface. A detailed description list of each signal (named in

the pin list) is organized by function in Table 2.2, “USB2412 Pin Descriptions,” on page 10. Refer to

Table 2.3, “Buffer Type Descriptions,” on page 12 for a list of buffer types.

The “N” symbol in the signal name indicates that the active, or asserted, state occurs when the signal

is at a low voltage level. When “N” is not present after the signal name, the signal is asserted when it

is at the high voltage level.

The terms assertion and negation are used exclusively. This is done to avoid confusion when working

with a mixture of “active low” and “active high” signals. The term assert, or assertion, indicates that a

signal is active, independent of whether that level is represented by a high or low voltage. The term

negate, or negation, indicates that a signal is inactive.

Pin Configuration

USBDP_UP

XTALOUT

XTALIN/CLKIN

PLLFILT

RBIAS

VDD33

USBDM_DN1

22

14

23

13

24

SMSC

12

25

USB2412

11

26 (Top View QFN-28) 10

27

9

28

Ground Pad

8

(must be connected to VSS)

VDD33

NON_REM1

OCS_N2

PRTPWR2

VDD33

CRFILT

OCS_N1

Revision 1.3 (12-27-11)

Indicates pins on the bottom of the device.

Figure 2.1 USB2412 28-Pin QFN

8

DATASHEET

SMSC USB2412

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