ML60852 Ver la hoja de datos (PDF) - Oki Electric Industry

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componentes Descripción

Fabricante

ML60852

USB Device Controller

Oki Electric Industry 

1Semiconductor

PEDL60852-01

ML60852

FUNCTIONAL DESCRIPTIONS

(1) USB Interface

The ML60852 is a USB device controller. The ML60852 provides the following functions which are bases for a

USB protocol. Therefore, the application can process a lot of its own functions.

• Bit synchronization

• Encoding and decoding NRZI signals.

• Generating and detecting Sync bytes.

• Bit stuffing

• Generating and checking CRCs (CRC5, CRC16).

• Encoding and decoding PID (packet identifier).

1. Decoding token.

2. Encoding and decoding handshake.

• Generating and detecting SOP.

• Enpacket (packing) and depacket (unpacking)

• Comparing device addresses.

• Storing 8-byte setup data from a host into the setup register.

• Transmitting data in transmit FIFO.

• Storing receive data into receive FIFO of the corresponding endpoint.

(2) USB Transfer Modes

The ML60852 supports four kinds of transfer modes such as control transfer mode , interrupt transfer mode, bulk

transfer mode, and isochronous transfer mode, which are specified by USB Standards.

(a) The control transfer mode is used to receive and respond to configurations and commands from a host, and to

exchange status information between the host and peripherals.

(b) The bulk transfer mode is used to transfer a lot of data in the limited service period when the band width of

USB bus becomes sufficient.

(c) The interrupt transfer mode is used to transfer a small amount of data unfreguently in the limited service period.

(d) The isochronous transfer mode is used to continuously transfer audio data, moving pictures data and other data.

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