VT8235 datasheet(19/145 Pages) VIA

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VT8235 V-Link South Bridge

Revision 1.22 October 24, 2002

-13-

Pin Descriptions

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Universal Serial Bus 2.0 Interface

Signal Name

Pin #

I/O

Signal Description

USBP0+

A21

USB 2.0 Port 0 Data +

USBP0–

B21

USB 2.0 Port 0 Data –

USBP1+

E21

USB 2.0 Port 1 Data +

USBP1–

D21

USB 2.0 Port 1 Data –

USBP2+

A19

USB 2.0 Port 2 Data +

USBP2–

B19

USB 2.0 Port 2 Data –

USBP3+

E19

USB 2.0 Port 3 Data +

USBP3–

D19

USB 2.0 Port 3 Data –

USBP4+

A17

USB 2.0 Port 4 Data +

USBP4–

B17

USB 2.0 Port 4 Data –

USBP5+

E17

USB 2.0 Port 5 Data +

USBP5–

D17

USB 2.0 Port 5 Data –

USBCLK

D23

USB 2.0 Clock.

48MHz clock input for the USB interface

USBOC0#

A15

USB 2.0 Port 0 Over Current Detect.

Port 0 is disabled if low.

USBOC1#

B15

USB 2.0 Port 1 Over Current Detect.

Port 1 is disabled if low.

USBOC2#

C15

USB 2.0 Port 2 Over Current Detect.

Port 2 is disabled if low.

USBOC3#

E15

USB 2.0 Port 3 Over Current Detect.

Port 3 is disabled if low.

USBOC4#

D14

USB 2.0 Port 4 Over Current Detect.

Port 4 is disabled if low.

USBOC5#

E14

USB 2.0 Port 5 Over Current Detect.

Port 5 is disabled if low.

USBVCC

(see pin list)

Power USB 2.0 Port Differential Output Interface Logic Voltage. 3.3V

USBGND

(see pin list)

Power USB 2.0 Port Differential Output Interface Logic Ground.

VSUSUSB

D15

Power USB 2.0 Suspend Power. 2.5V ±5%.

VCCUPLL

A23, D22

Power USB 2.0 PLL Analog Voltage. 2.5V ±5%.

GNDUPLL

B23, E22

Power USB 2.0 PLL Analog Ground.

System Management Bus (SMB) Interface (I

2C Bus)

Signal Name

Pin #

I/O

Signal Description

SMBCK1

AB3

SMB / I

2C Channel 1 Clock.

SMBCK2

/ GPI27 / GPO27

AE1

SMB / I

2C Channel 2 Clock. Rx95[2] = 0

SMBDT1

AC2

SMB / I

2C Channel 1 Data.

SMBDT2

/ GPI26 / GPO26

AD1

SMB / I

2C Channel 2 Data. Rx95[2] = 0

SMBALRT#

AB2

SMB Alert.

(enabled by System Management Bus I/O space Rx08[3] =

1) When the chip is enabled to allow it, assertion generates an IRQ or

SMI interrupt or a power management resume event. Connect to a 10K

ohm pullup to VSUS33 if not used.

Programmable Chip Selects

Signal Name

Pin #

I/O

Signal Description

PCS0#

/ GPIO20 / ACSDIN2

Programmable Chip Select 0.

RxE4[6]=1, E5[1]=1

PCS1#

/ GPIO21 / ACSDIN3 / SLPBTN#

Programmable Chip Select 1.

RxE4[6]=1, E5[2]=1

VT8235 Datasheet(PDF) 19 Page - VIA Technologies, Inc.

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