C8051F38B-GMR View Datasheet(PDF) - Silicon Laboratories

Part Name

Description

Manufacturer

C8051F38B-GMR

Full Speed USB Flash MCU Family

Silicon Laboratories 

C8051F380/1/2/3/4/5/6/7/C

21. Universal Serial Bus Controller (USB0)

C8051F380/1/2/3/4/5/6/7/C devices include a complete Full/Low Speed USB function for USB peripheral

implementations. The USB Function Controller (USB0) consists of a Serial Interface Engine (SIE), USB

Transceiver (including matching resistors and configurable pull-up resistors), 1 kB FIFO block, and clock

recovery mechanism for crystal-less operation. No external components are required. The USB Function

Controller and Transceiver is Universal Serial Bus Specification 2.0 compliant.

Transceiver

VDD

D+

D-

Serial Interface Engine (SIE)

Endpoint0

Data

Transfer

Control

IN/OUT

Endpoint1

Endpoint2

IN EOnUdpToint3

IN OUT

IN OUT

USB

Control,

Status, and

Interrupt

Registers

CIP-51 Core

USB FIFOs

(1k RAM)

Figure 21.1. USB0 Block Diagram

Important Note: This document assumes a comprehensive understanding of the USB Protocol. Terms and

abbreviations used in this document are defined in the USB Specification. We encourage you to review the

latest version of the USB Specification before proceeding.

Note: The C8051F380/1/2/3/4/5/6/7/C cannot be used as a USB Host device.

21.1. Endpoint Addressing

A total of eight endpoint pipes are available. The control endpoint (Endpoint0) always functions as a bi-

directional IN/OUT endpoint. The other endpoints are implemented as three pairs of IN/OUT endpoint

pipes:

172

Rev. 1.4

Share Link: