mcs7830 MosChip, mcs7830 Datasheet - Page 8

• Manufacturer Part Number: mcs7830
• Description: Usb-2.0 To Ethernet
• Manufacturer: MosChip

MCS7830
USB-2.0 to Ethernet
Functional Description
The MCS7830 is ideal for Local Area Network (LAN) applications. This is accomplished by its highly
integrated functionality by providing internal buffering to enable parallel operations from USB ports on the host
side, and MAC port on the Ethernet side.
iSerial Feature: By writing a unique serial number into the EEPROM, each of the MCS7830 products can be
uniquely identifi ed by the Windows OS. The iSerial feature is supported with the EEPROM only.
Locally Administered Network Address: Every Ethernet card has a unique physical address assigned to it
when it is manufactured. In some cases the user may need to change this address. This can be accomplished
by assigning a “Locally Administered Network Address” to the device by the network administrator, thereby
overriding the “Universally Administered Address.” Refer to the application note for more details.
Lower Power Mode Support: The MCS7830 controller supports low power mode by taking less than 100
mA in Unconfi gured mode and less than or equal to 2.5 mA in Suspend mode. The remote wake-up (Wake on
LAN) feature and low power mode are mutually exclusive features. By default, low power mode is enabled.
Remote wake-up can be enabled through system level component selection. Refer to application notes for
more details.
Suspend / Wake up from Standby: The MCS7830 can wake up from Suspend/Standby using either magic
packets, or by implementing external wake up switch. On wake-up, the device can resume back to the original
operating mode from which it entered Suspend.
Wake up through magic packets is supported when the remote wake-up (Wake on LAN) feature is enabled.
Similarly, wake-up through and external switch can be supported when low power mode is enabled.
MII Interface: The MCS7830 128-pin package supports and MII interface for use with an external Ethernet
PHY. Refer to the MII application note of the MCS7830 for more details.
USB-2.0 Interface: This device has a USB-2.0 PIE (Parallel Interface Engine), allowing both High-Speed
(HS) and Full Speed (FS) operation, either of which is able to control all USB transactions. CRC checking
and generation is done in the PIE block only. The USB Control and Endpoint Decoder blocks will decode
all the standard and vendor specifi c commands. The PIE and USB transceiver, which provide the hardware
interface to the USB cable, together comprise the USB Engine. This device supports all standard USB
commands, as well as fi ve vendor specifi c commands.
The USB device controller uses one interface, one confi guration, and three endpoints (Bulk-Out, Bulk-In and
Interrupt-In) apart from Endpoint-0. The details of the device descriptor, confi guration descriptor, interface
descriptor, and endpoint descriptors are explained below.
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3.1