Xerox WorkCentre Pro 412 Service Manual page 50

Circuit Description
5-4-2 USB INTERFACE
5-4-2-1 Features
• Full-Speed USB Node Device.
• USB transceiver.
• 3.3V signal voltage regulator.
• 48 MHz oscillator circuit.
• Programmable clock generator.
• Serial Interface Engine consisting of Physical Layer Interface (PHY) and Media Access Controller (MAC),
USB Specification 1.0 compliant.
• Control/Status Register File.
• USB Function Controller with seven FIFO-based End-points.
• One bidirectional Control Endpoint 0 (8bytes).
• Three Transmit Endpoints (2*32 and 1*64 bytes).
• Three Receive Endpoints (2*32 and 1*64 bytes).
• 8-bit parallel interface with two selectable modes - non-multiplexed.
• multiplexed (Intel compatible).
• DMA support for parallel interface.
• MICROWIRE/PLUS Interface.
• 28-pin SO package.
5-24
August 2001
WorkCentre Pro 412
Launch Issue