SPEAR-09-H022 datasheet(39/55 Pages) STMICROELECTRONICS

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SPEAR-09-H022

6 IP Description

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6.8

USB 2.0 DEVICE

6.8.1

OVERVIEW

Three blocks drive the USB 2.0 Device interface on SPEAr Head.

The first one is the USB2.0PHY, which executes the serialization and the de-serialization and

implements the transceiver for the USB line.

The second is the UDC (USB 2.0 Device Controller). It is connected on AHB Bus and

generates the commands for USB2.0PHY in UTMI+ interface.

The last block is the USB Plug Detect, which detects the connection of the device.

6.8.1.1 USB2.0PHY

The USB2.0PHY is a hard macro designed using standard cells and custom cells. In this way is

possible to reach the max speed HS of USB: 480 Mbits/Sec.

6.8.1.2 UDC

The UDC is able to detect the USB connection speed via UTMI+ interface.

There is an AHB master and three slaves.

The UDC contains 6 endpoints (0 control, 1 Bulk IN, 2 Bulk OUT, 3 ISO IN, 4 ISO OUT, 5

Interrupt IN) and 4 configurations.

6.9

ETHERNET MAC 110

The Ethernet Media Access Controller (MAC 110) incorporates the requirements for operation

of an Ethernet / IEEE 802.3 compliant node and provides interface between the host system

and the Media Independent Interface (which is embedded in SPEAr Head).

MAC 110 core features are:

●

It can operate either in 100 Mbps mode or 10 Mbps mode, depending on the clock

provided on the MII interface

●

It can operate both in Half-Duplex mode and Full-Duplex mode.

When operating in the Half-Duplex mode, the MAC110 core is fully compliant to Section 4

of ISO / IEC 8802-3 (ANSI / IEEE Standard) and ANSI / IEEE 802.3.

When operating in the Full-Duplex mode, the MAC110 core is compliant to the IEEE

802.3x standard for Full-Duplex operations. It is also compatible with Home PNA 1.1.

The MAC110 core provides programmable enhanced features designed to minimize host

supervision, bus utilization, and pre- or post-message processing. These features include:

●

Ability to disable retires after a collision

●

Dynamic FCS generation on a frame-by-frame basis

●

Automatic Pad field insertion and deletion to enforce minimum frame size attributes

●

Automatic retransmission and detection of collision frames.

The MAC110 core can sustain transmission or reception of Minimal-Sized Back-To-Back

packets at full line speed with an Inter-Packet Gap (IPG) of 90.6 µs for 10 Mb/s and 0.96 µs for

100 Mb/s.

SPEAR-09-H022 Datasheet(PDF) 39 Page - STMicroelectronics

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