SMSC USB2512i Benutzerhandbuch

Industrial Temperature Rated USB 2.0 High-Speed 2-Port Hub Controller

SMSC USB2512i

11

Revision 1.92 (11-28-07)

0

1

Configured as an SMBus slave for external download of user-defined 

descriptors.

„

SMBus slave address 58 (0101100x)

„

Strap Options Disabled

„

All Settings Controlled by Registers

1

0

Internal Default Configuration 

„

Strap Options Enabled

„

Bus Power Operation

1

1

2-Wire I2C EEPROMS are supported.

„

Strap Options Disabled

„

All Settings Controlled by Registers

VDD18

14

VDD Core

This pin must have a 1.0

μ

F (or greater) ±20% (ESR <0.1

Ω

) capacitor to 

VSS.

VDD33PLL

36

VDD 3.3 PLL Regulator Reference

+3.3V power supply for the PLL. If the internal PLL 1.8V regulator
is enabled, then this pin acts as the regulator input.

VDDPLL18

34

VDD PLL

This pin must have a 1.0

μ

F (or greater) ±20% (ESR <0.1

Ω

) capacitor to 

VSS.

VDDA33

5

10

29

VDD Analog I/O

+3.3V Filtered analog PHY power, shared between adjacent ports.

VDD33/VDD33CR

23

15

VDDIO/VDD 3.3 Core Regulator Reference

+3.3V power supply for the Digital I/O

If the internal core regulator is enabled, then VDD33CR acts as the 

regulator input.

NC

6

7

8

9

18

19

20

21

No Connect

Leave unconnected on the circuit board.