Product specifications

VT8235 V-Link South Bridge
Revision 1.22 October 24, 2002 -13- Pin Descriptions
Universal Serial Bus 2.0 Interface
Signal Name Pin # I/O Signal Description
USBP0+
A21 IO
USB 2.0 Port 0 Data +
USBP0–
B21 IO
USB 2.0 Port 0 Data –
USBP1+
E21 IO
USB 2.0 Port 1 Data +
USBP1–
D21 IO
USB 2.0 Port 1 Data –
USBP2+
A19 IO
USB 2.0 Port 2 Data +
USBP2–
B19 IO
USB 2.0 Port 2 Data –
USBP3+
E19 IO
USB 2.0 Port 3 Data +
USBP3–
D19 IO
USB 2.0 Port 3 Data –
USBP4+
A17 IO
USB 2.0 Port 4 Data +
USBP4–
B17 IO
USB 2.0 Port 4 Data –
USBP5+
E17 IO
USB 2.0 Port 5 Data +
USBP5–
D17 IO
USB 2.0 Port 5 Data –
USBCLK
D23 I USB 2.0 Clock. 48MHz clock input for the USB interface
USBOC0#
A15 I USB 2.0 Port 0 Over Current Detect. Port 0 is disabled if low.
USBOC1#
B15 I USB 2.0 Port 1 Over Current Detect. Port 1 is disabled if low.
USBOC2#
C15 I USB 2.0 Port 2 Over Current Detect. Port 2 is disabled if low.
USBOC3#
E15 I USB 2.0 Port 3 Over Current Detect. Port 3 is disabled if low.
USBOC4#
D14 I USB 2.0 Port 4 Over Current Detect. Port 4 is disabled if low.
USBOC5#
E14 I 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
2
C Bus)
Signal Name Pin # I/O Signal Description
SMBCK1
AB3 IO
SMB / I
2
C Channel 1 Clock.
SMBCK2 / GPI27 / GPO27 AE1 IO SMB / I
2
C Channel 2 Clock. Rx95[2] = 0
SMBDT1
AC2 IO
SMB / I
2
C Channel 1 Data.
SMBDT2 / GPI26 / GPO26 AD1 IO SMB / I
2
C Channel 2 Data. Rx95[2] = 0
SMBALRT#
AB2 I 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 U2 O Programmable Chip Select 0. RxE4[6]=1, E5[1]=1
PCS1# / GPIO21 / ACSDIN3 / SLPBTN# V1 O Programmable Chip Select 1. RxE4[6]=1, E5[2]=1