SMSC USB2524 Instrukcja Użytkownika Pobierz pdf (Strona 16)

USB MultiSwitch

Hub

Datasheet

Revision 1.91 (08-22-07) 16 SMSC USB2524

DATASHEET

VDD PLL VDDPLL18 +1.8V Filtered analog power for internal PLL.

This pin must have a 4.7μF (or greater) ±20% (ESR

<0.1Ω) capacitor to VSS

VDD Analog

I/O

VDDA33 +3.3V Filtered analog PHY power, shared between

adjacent ports.

VSS VSS Ground

NC NC No Connect

Table 4.5 Buffer Type Descriptions

BUFFER DESCRIPTION

I Input.

IPD Input, Weak Internal pull-down.

IPU Input, Weak Internal pull-up.

IS Input with Schmitt trigger.

IOSD12 Open drain….12mA sink with Schmitt trigger, and must meet I2C-Bus Specification Version 2.1

requirements.

ICLKx XTAL Clock Input

OCLKx XTAL Clock Output

I-R RBIAS

IO-U Defined in USB Specification.

Note: Meets USB 1.1 requirements when operating as a 1.1-compliant device and meets

USB 2.0 requirements when operating as a 2.0-compliant device.

AIO Analog Input/output. Per PHY test requirements.

Table 4.4 Power, Ground, and No Connect (continued)

NAME SYMBOL TYPE FUNCTION

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 56 57

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SMSC USB2524 Instrukcja Użytkownika Strona 16