EVB-USB4640 SMSC, EVB-USB4640 Datasheet - Page 20

• Manufacturer Part Number: EVB-USB4640
• Description: EVALUATION BOARD FOR USB4640
• Manufacturer: SMSC

Specifications of EVB-USB4640

• Main Purpose: Interface, USB 2.0 Hub
• Embedded: *
• Utilized Ic / Part: USB4640
• Primary Attributes: *
• Secondary Attributes: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 638-1107

Revision 1.0 (06-09-09)
(CRD_PWR)
SYMBOL
nRESET
GPIO2 /
PLLFILT
GPIO10
CRFILT
VDD12
VDD33
TEST
RXD
VSS
48-PIN
ePad
QFN
36
35
38
40
15
46
41
12
16
25
34
48
5
Table 6.1 USB4640/USB4640i Pin Descriptions (continued)
(Table
BUFFER
I/O200
TYPE
I/O6
IS
I
6.2)
DIGITAL / POWER / GROUND
DESCRIPTION
This pin may be used either as input, edge sensitive interrupt input,
or output. Custom firmware is required to activate this function.
This signal can be configured as input to the RXD of the internal
UART. Custom firmware is required to activate this function.
Card power drive: 3.3 V (100 mA or 200 mA)
This must be the only FET used to power devices. Failure to do this
will violate voltage specifications on device pins. If this pin is not
being used as a card power pin, this pin may be used either as input,
edge sensitive interrupt input, or output (GPIO).
Please see
Configuration," on page 38
RESET input
The system uses this active low signal to reset the chip. The active
low pulse should be at least 1 μs wide.
TEST Input
Tie this pin to ground for normal operation.
VDD Core Regulator Filter Capacitor
This pin requires a 1.0 μF (or greater) ± 20% (ESR <0.1
to VSS.
Phase-locked Loop Regulator Filter Capacitor
This pin requires a 1.0 μF (or greater) ± 20% (ESR <0.1
to VSS.
1.2 V Power for HSIC pads and buffers
3.3 V Power and Regulator Input
Please see
information.
Pins 16 and 48 each require an external bypass capacitor of 4.7 μF
minimum.
The ground pad is the only VSS for the device and must be tied to
ground with multiple vias.
DATASHEET
High Speed Inter-Chip (HSIC) USB 2.0 Hub and Flash Media Controller
20
Section 8.4.2.3, "A4h-A5h: Smart Media Device Power
Chapter 10, "DC Parameters," on page 55
for more information.
SMSC USB4640/USB4640i
for more
Ω
Ω
) capacitor
) capacitor
Datasheet