Product specifications

VT8237R Data Sheet
Revision 2.06 December 15, 2004 -14- Pin Descriptions
USB, SMB Pin Descriptions
Universal Serial Bus 2.0 Interface
Signal Name Pin # I/O Signal Description
USBP0+
E20 IO
USB 2.0 Port 0 Data +
USBP0–
D20 IO
USB 2.0 Port 0 Data –
USBP1+
A20 IO
USB 2.0 Port 1 Data +
USBP1–
B20 IO
USB 2.0 Port 1 Data –
USBP2+
E18 IO
USB 2.0 Port 2 Data +
USBP2–
D18 IO
USB 2.0 Port 2 Data –
USBP3+
A18 IO
USB 2.0 Port 3 Data +
USBP3–
B18 IO
USB 2.0 Port 3 Data –
USBP4+
D16 IO
USB 2.0 Port 4 Data +
USBP4–
E16 IO
USB 2.0 Port 4 Data –
USBP5+
A16 IO
USB 2.0 Port 5 Data +
USBP5–
B16 IO
USB 2.0 Port 5 Data –
USBP6+
D14 IO
USB 2.0 Port 6 Data +
USBP6–
E14 IO
USB 2.0 Port 6 Data –
USBP7+
A14 IO
USB 2.0 Port 7 Data +
USBP7–
B14 IO
USB 2.0 Port 7 Data –
USBCLK
E23 I USB 2.0 Clock. 48 MHz clock input for the USB interface
USBOC0#
C26 I USB 2.0 Port 0 Over Current Detect. Port 0 is disabled if low.
USBOC1#
D24 I USB 2.0 Port 1 Over Current Detect. Port 1 is disabled if low.
USBOC2#
B26 I USB 2.0 Port 2 Over Current Detect. Port 2 is disabled if low.
USBOC3#
C25 I USB 2.0 Port 3 Over Current Detect. Port 3 is disabled if low.
USBOC4#
B24 I USB 2.0 Port 4 Over Current Detect. Port 4 is disabled if low.
USBOC5#
A24 I USB 2.0 Port 5 Over Current Detect. Port 5 is disabled if low.
USBOC6#
A26 I USB 2.0 Port 6 Over Current Detect. Port 6 is disabled if low.
USBOC7#
A25 I USB 2.0 Port 7 Over Current Detect. Port 7 is disabled if low.
UDPWR / GPI9 D26 I USB 2.0 Power. (Device 17 Function 0 RxE4[5] = 0)
UDPWREN# / GPO9 D25 O USB 2.0 Power Enable. (Device 17 Function 0 RxE4[5] = 0)
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
C24
Power
USB 2.0 Suspend Power. 2.5V ±5%.
VCCUPLL
A23, B23
Power
USB 2.0 PLL Analog Voltage. 2.5V ±5%.
GNDUPLL
C23, D23
Power USB 2.0 PLL Analog Ground.
System Management Bus (SMB) Interface (I
2
C Bus)
Signal Name Pin # I/O Signal Description
SMBCK1
AC4 IO
SMB / I
2
C Channel 1 Clock.
SMBCK2 / GPI27 / GPO27 AC3 IO SMB / I
2
C Channel 2 Clock. Rx95[2] = 0
SMBDT1
AB2 IO
SMB / I
2
C Channel 1 Data.
SMBDT2 / GPI26 / GPO26 AD1 IO SMB / I
2
C Channel 2 Data. Rx95[2] = 0
SMBALRT#
AB1 I SMB Alert. Enabled by System Management Bus I/O space Rx8[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.