mcs7710 MosChip, mcs7710 Datasheet - Page 5

• Manufacturer Part Number: mcs7710
• Description: Usb-1.1 To Single Serial Port
• Manufacturer: MosChip

Rev. 1.1
USB Description
Analog Transceivers
The on-chip transceivers are connected directly to
USB cables through external series resistors. They
transmit and receive serial data at both full-speed
(12Mbit/s) and low-speed (1.5Mbit/s) data rates. Slew
rates are automatically adjusted according to the
speed of the device connected and lie within the range
defined in the USB Specification Rev. 1.1.
Serial Interface Engine
This
protocol layer including: parallel /serial conversion,
synchronization pattern recognition, CRC checking/
generation, bit (de)stuffing, packet identifier (PID)
verification/generation,
handshake evaluation/generation.
Bit Clock Recovery
The bit clock recovery circuit recovers the clock from
the incoming USB data stream using 4x over sampling.
It is able to track in the presence of jitter and frequency
drift as specified by the USB Specification Rev. 1.1.
3.3V Source
A 5V to 3.3V DC-DC regulator is integral to the chip
relieving the need for a +3.3V source. It supplies the
analog transceivers and internal logic and can be used
to supply the 1.5kΩ pull-up resistor on the DP line of
the upstream connection.
PLL Clock Multiplier
An integral Phase-Locked Loop (PLL) performs 6 to
48MHz clock multiplication and requires no external
components except the crystal. This allows for the use
of low-cost 6MHz crystals which reduce high frequency
radiated Electro-Magnetic Interference (EMI).
engine
implements
address
the
recognition
complete
USB
and
USB Interface
All standard USB requests received from the
host are processed on-board without the need of
firmware intervention. The MCS7710 supports Bus-
Powered operation only. The USB interface to the
host controller includes a Control endpoint, a Bulk-
In endpoint, a Bulk-Out endpoint and an Interrupt
endpoint. The USB controller supports the USB-
1.1 specification. Hence, it supports all standard
functionality associated with device enumeration,
standard USB device requests, etc. In addition,
there are Vendor Specific commands provided to
allow a USB driver to access registers and ROM in
the USB controller.
USB-1.1 to Single Serial Port
MCS7710
Page 5