 Simple Wireless Operation by Just
Bringing Two Devices Close Together |
|
"TransferJet" resolves issues such as complex
connection settings and unstable data transfer
states that existing wireless technologies
suffer from and is a wireless technology that
supports high-speed data transfers over the air
at up to 560 Mbps (with a maximum effective
rate of 375 Mbps at the protocol level).
"TransferJet" adopts an intuitive interface
in which communication can be performed
simply by bringing the devices that you
want to communicate close to each other.
Furthermore, it does not require the complex
connection settings or access points that are
required by traditional wireless systems. |
| PCIe and USB 2.0 Interfaces Provided |
|
The CXD3270GG shares the same tried
and tested "TransferJet" physical layer as the CXD3267AGG and CXD3268AGW
first generation ICs. The one-chip IC
configuration is now compatible with both
PCIe and USB 2.0 interfaces. (See table 1.)
While Sony marketed a module with the first
generation IC that supported PCIe and USB,
it required a bridge chip for converting the
IC Host interface to PCIe and USB. With the
current introduction of the CXD3270GG,
these interfaces have been integrated into
the IC, reducing the number of components
and greatly shrunk the IC footprint. Module
design has also been simplified to lower costs.
(See figure 1.) |
High Data Transfer Rate and
Low CPU Load
|
|
The CXD3270GG provides a transfer speed
that is close to the theoretical maxmum of
375 Mbps. In simple data transfers using
device drivers, the PCIe interface provides a
throughput exceeding 360 Mbps. (See figure
2.) Thanks to redesigned hardware, device
drivers and firmware, data transfers using
the SCSI or OBEX protocol are faster than
similar operations on the first generation IC.
(See figure 3.) Loading of the host CPU has
gone down by 1/5. (See figure 4.) |
Firmware Implemented Modes
|
|
By changing the firmware, the CXD3270GG
can operate in several new modes.
1. PCIe mode
2. USB Bridge mode: Although special
drivers must be installed on the host side,
they will enable use of the SCSI and OBEX protocols.
3. USB MSC mode: By mapping SCSI to
the USB protocol the need for special
drivers is eliminated. A device with USB
connectors can be connected without the
need for modifications. |
Both Windows Drivers and
Applications Are Provided
|
|
Windows drivers and applications for the
CXD3270GG support both x86/x64 versions
of Windows 7. The drivers support SCSI and
OBEX, the "TransferJet" protocols, and the
following applications are also provided. (See
figure 5.)
1. TransferJet Manager: An application
that resides in the task tray turning
"TransferJet" On and Off and opening
setup screens.
2. TransferJet Level Meter: Indicates
the field intensity between two linked
equipment.
3. TransferJet Self-Check Tool:
Checks for problems when "TransferJet" is
not operating. |
Second Generation IC for TransferJet™,
Enabling High-Speed Data Transfer
with PCIe/USB 2.0 Interfaces
Vol.64