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ADVANCE INFORMATION

8x930Hx

UNIVERSAL SERIAL BUS HUB

PERIPHERAL CONTROLLER

s

USB Hub with One Upstream, One

Internal Downstream, and Three

External Downstream Ports on HD/HE

Parts or Four on HF/HG Parts

鈥?Complete Universal Serial Bus Speci-

fication 1.0 Compatibility

鈥?Serves as both USB Hub and USB

Embedded Function (Internal Port)

s

USB Hub

鈥?Connectivity Management

鈥?Downstream Device

Connect/Disconnect Detection

鈥?Power Management, Including

Suspend and Resume

鈥?Bus Fault Detection and Recovery

鈥?Full and Low Speed Downstream

Device Support

s

Output Pin for Port Power Switching

s

Input Pin for Overcurrent Detection

s

USB Embedded Function

鈥?Supports Isochronous and

Non-isochronous Data

s

On-chip USB Transceivers

s

Serial Bus Interface Engine (SIE)

鈥?Packet Decoding/Generation

鈥?CRC Generation and Checking

鈥?NRZI Encoding/Decoding and

Bit-stuffing

s

Hub FIFO Data Buffers

鈥?One Pair of 16-byte Transmit and

Receive FIFOs

鈥?One 1-byte Transmit Register

s

Embedded Function FIFO Data Buffers

鈥?Three Pairs of 16-byte Transmit and

Receive FIFOs

鈥?One Pair of Configurable Transmit

and Receive FIFOs (1 Kbyte total)

s

Automatic Transmit/Receive FIFO

Management

s

Three USB Interrupt Vectors

鈥?Endpoint Transmit/Receive Done

鈥?Start of Frame/Hub Endpoint Done

鈥?Global Suspend/Resume

s

Low Clock Mode

s

User-selectable Configurations

鈥?External Wait State

鈥?External Address Range

鈥?Page Mode

s

Real-time Wait Function

s

256-Kbyte External Code/Data Memory

Space

s

On-chip ROM Options

鈥?0, 8, or 16 Kbytes

s

1024 bytes On-chip Data RAM

s

Four Input/Output Ports

s

Standard MCS

廬

51 UART

s

Power-saving Idle and Powerdown

Modes

s

Register-based MCS

廬

251 Architecture

s

Code-compatible with MCS 51 and

MCS 251 Microcontrollers

s

12-MHz Crystal Operation

The 8x930Hx USB hub peripheral controller is based on the MCS 251 microcontroller. It consists of standard

8XC251Sx peripherals plus a USB module. The USB module provides both USB hub and USB embedded

function capabilities. The 8x930Hx supports USB hub functionality, embedded function, suspend/resume

modes, isochronous/non-isochronous transfers, and it is fully USB rev 1.0 specification compliant. The USB

module contains one internal and three (or four) external downstream ports and integrates the USB trans-

ceivers, serial bus interface engine (SIE), hub interface unit (HIU), function interface unit (FIU), and

transmit/receive FIFOs. The 8x930Hx uses the standard instruction set of the MCS 251 architecture, which is

binary code compatible with the MCS 51 architecture.

May 1997

Order Number: 272928-003

型號

版本

描述

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