EVB-USB2660/USB2660i Evaluation Board Revision A User Manual
SMSC EVB-USB2660/60i Revision A
5
Revision 1.0 (06-09-09)
USER MANUAL
2.1.5
Media Interface 1
The USB2660/60i supports a wide array of devices. Media Interface 1 accommodates all of the media
types supported through the use of three media socket connectors. Adapters may be needed for some
form factors.
J8 supports SD media up to the specification limit of 4 bits wide. It also supports MMC media up
to the specification 2.0 of 8 bits wide.
J9 supports MS, MS Pro, MS Duo, and MS Pro-HG media at up to the specification limit of 8 bits
wide.
J10 supports xD-Picture Card media.
Since these connectors are all on the same media bus, only one device is allowed to be inserted into
any of these media socket connectors at one time for the Media Interface 1.
A device may be inserted into the media interface 2 connector (J7) and simultaneously accessed while
a single device is inserted and being accessed in Media Interface 1.
2.1.6
Media Interface 2
Media Interface 2 accommodates all of the SD and MMC media types supported through the use of
the media socket connectors at J7. Adapters may be needed for some form factors.
2.1.7
Connector Description
The EVB-USB2660/60i has a set of standard USB style connectors, one of type B for the upstream
port and two of type A for downstream ports. It also has a standard set of media storage style
connectors, which supports popular flash media formats from the xD-Picture Card (xD), Memory Stick
(MS), Secure Digital (SD), and MultiMediaCard (MMC) families. Power is supplied via a 2.0 mm power
jack.
lists all of the connectors. For more details on the pinout of the connectors please see
the schematic.
2.1.8
Layout Considerations
The EVB-USB2660/60i is designed on four PCB layers: two signal layers and two supply layers. The
PCB layer stack is shown in
. All signals are routed on top and bottom layers. Internal layers
are ground and power. Note that the differential signals from the USB2660/60i match the upstream
and downstream port placement, and that the media I/F signals flow easily to their destination
connectors simplifying routing of critical signals.
Table 2.1 Connector Description
CONNECTOR
TYPE
DESCRIPTION
J1
USB B
Upstream Port
J2
USB A
Downstream Port 3
J3
USB A
Downstream Port 2
J4
Power Jack 2.0mm
+5 VDC Power Supply
J5
Header
GPIO Test - DNP
J6
Header
SPI Test - DNP
J7
SD/MMC4.0
SD/MMC I/F #2
J8
SD/MMC4.0
SD/MMC I/F #1
J9
MS/MS Duo/MS Pro-HG
MS I/F
J10
xD
xD I/F
Table 2.2 PCB layer stack
Component Side
Solder mask