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X930A: DescriptionUNIVERSAL SERIAL BUS MICROCONTROLLER; File Size172KB，38 Pages; ManufacturerIntel; Websitehttp://www.intel.com/

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UNIVERSAL SERIAL BUS MICROCONTROLLER

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ADVANCE INFORMATION

8x930Ax

UNIVERSAL SERIAL BUS

MICROCONTROLLER

Complete Universal Serial Bus

Specification 1.0 Compatibility

— Supports Isochronous and

Non-isochronous Data

— Bidirectional Half-duplex Link

On-chip USB Transceiver

Serial Bus Interface Engine (SIE)

— Packet Decoding/Generation

— CRC Generation and Checking

— NRZI Encoding/Decoding and

Bit-stuffing

USB Reset Interrupt

Four Transmit FIFOs

— Three 16-byte FIFOs

— One Configurable FIFO (up to

1 Kbyte)

Four Receive FIFOs

— Three 16-byte FIFOs

— One Configurable FIFO (up to

1 Kbyte)

Automatic Transmit/Receive FIFO

Management

Suspend/Resume Operation

Three New USB Interrupt Vectors

— USB Function Interrupt

— Start of Frame

— Suspend/Resume

Phase-locked Loop

— 12 Mbps or 1.5 Mbps Data Rate

Low Clock Mode

User-selectable Configurations

— External Wait State

— Address Range

— Page Mode

Real-time Wait Function

256-Kbyte External Code/Data Memory

Space

On-chip ROM Options

— 0, 8, or 16 Kbytes

1 Kbyte On-chip Data RAM

Four Input/Output Ports

— 1 Open-drain port

— 3 Quasi-bidirectional Ports

Programmable Counter Array (PCA)

— 5 Capture/Compare Modules

Serial I/O Port (UART)

Hardware Watchdog Timer

Three Flexible 16-bit Timer/Counters

Power-saving Idle and Powerdown

Modes

251 Architecture

— 40-byte Register File

— Registers Accessible as Bytes,

Words, or Doublewords

Code Compatible with MCS 51 and MCS

251 Microcontrollers

6 or 12 MHz Crystal Operation

The 8x930Ax USB microcontroller is based on an 8xC251Sx microcontroller core. It consists of standard

8xC251Sx peripherals plus an added USB function. The 8x930Ax uses the standard instruction set of the

MCS 251 architecture, which is binary code compatible with the MCS 51 architecture. The USB function

integrates the USB transceiver, serial bus interface engine (SIE), function interface unit (FIU) and

transmit/receive FIFOs. The USB function also supports full-speed/low-speed data rates, suspend/resume

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

February 1997

Order Number:

272917-003

CONTENTS

1.0 Nomenclature Overview ...................................................................................................... 3

2.0 Pinout .................................................................................................................................. 4

3.0 Signals ................................................................................................................................ 7

4.0 Address Map ..................................................................................................................... 10

5.0 Electrical Characteristics ................................................................................................... 11

5.1 Operating Frequencies ................................................................................................. 12

5.2 DC Characteristics........................................................................................................ 13

5.3 Definition of AC Symbols.............................................................................................. 15

5.4 AC Characteristics........................................................................................................ 16

5.4.1 System Bus AC Characteristics ............................................................................16

5.4.2 System Bus Timing Diagrams, Nonpage Mode ....................................................18

5.4.3 System Bus Timing Diagrams, Page Mode ...........................................................20

5.4.4 Definition of Real-time Wait Symbols ....................................................................22

5.4.5 Real-time Wait Function AC Characteristics .........................................................22

5.4.6 Real-Time Wait Function Timing Diagrams ...........................................................23

5.5 AC Characteristics — Serial Port, Synchronous Mode 0 ............................................. 27

5.6 External Clock Drive ..................................................................................................... 28

5.7 Testing Waveforms ...................................................................................................... 29

6.0 Thermal Characteristics .................................................................................................... 30

7.0 Product Reference ............................................................................................................ 30

7.1 External Bus Timing and Peripheral Timing Affected by PLLSEL2:0 Selection ........... 30

7.2 Low Clock Mode Frequency ......................................................................................... 30

7.3 Setting FFRC Bit Clears Only the Oldest Packet in the FIFO ...................................... 30

7.4 Series Resistor Requirement for Impedance Matching ................................................ 30

7.5 Pullup Requirement for Full Speed Device and Low Speed Device............................. 30

7.6 Powerdown Mode Cannot Be Invoked Before USB Suspend ...................................... 30

8.0 Specification Supplement for 8

930A

3 and 8

930A

4.................................................... 31

8.1 Six Endpoint Pairs Functionality ................................................................................... 31

8.2 DC Characteristics........................................................................................................ 31

8.3 Extended Data Float (EDF) AC Timing Feature ........................................................... 31

9.0 Device Errata .................................................................................................................... 34

10.0 Datasheet Revision History ............................................................................................... 34

iii

8x930Ax UNIVERSAL SERIAL BUS MICROCONTROLLER

Figures

10.

11.

12.

13.

14.

15.

16.

17.

18.

19.

8x930Ax Internal Block Diagram ..........................................................................................1

USB Module Block Diagram.................................................................................................2

Product Nomenclature .........................................................................................................3

8x930Ax 68-pin PLCC Package...........................................................................................4

Clock Circuit .......................................................................................................................12

8x930Ax Code Fetch, Nonpage Mode ...............................................................................18

8x930Ax Data Read, Nonpage Mode ................................................................................19

8x930Ax Data Write, Nonpage Mode.................................................................................19

8x930Ax Code Fetch, Page Mode .....................................................................................20

8x930Ax Data Read, Page Mode.......................................................................................21

8x930Ax Data write, Page Mode........................................................................................21

External Code Fetch/Data Read (Nonpage Mode, Real-time Wait State) .........................23

External Data Write (Nonpage Mode, Real-time Wait State) .............................................24

External Data Read (Page Mode, Real-time Wait State) ...................................................25

External Data Write (Page Mode, Real-time Wait State) ...................................................26

Serial Port Waveform — Synchronous Mode 0..................................................................27

External Clock Drive Waveforms........................................................................................28

AC Testing Input, Output Waveforms.................................................................................29

Float Waveforms ................................................................................................................29

Tables

10.

11.

12.

13.

14.

15.

16.

17.

18.

19.

20.

21.

Description of Product Nomenclature...................................................................................3

Proliferation Options.............................................................................................................3

68-pin PLCC Pin Assignment...............................................................................................5

68-pin PLCC Signal Assignments Arranged by Functional Category ..................................6

Signal Descriptions ..............................................................................................................7

Memory Signal Selections (RD1:0) ....................................................................................10

930A

Address Map .......................................................................................................10

Frequency Selection and Operating Frequency.................................................................12

DC Characteristics at Operating Conditions.......................................................................13

AC Timing Symbol Definitions............................................................................................15

AC Characteristics at Operating Conditions.......................................................................16

Real-time Wait Timing Symbol Definitions .........................................................................22

Real-time Wait AC Timing Specifications...........................................................................22

Serial Port Timing — Synchronous Mode 0 .......................................................................27

External Clock Drive...........................................................................................................28

Thermal Characteristics .....................................................................................................30

SIx Endpoint Pair Feature ..................................................................................................31

Effect of “EDF#” on Wait States .........................................................................................31

AC Characteristics for 8x930Ax3 and 8x930Ax4 in Compatibility Mode ............................32

930A

3 and 8

930A

4 Default and Extended Data Float Timings.................................32

930A

3 and 8

930A

4 Real-time Wait State AC Timing Specifications ........................33

X930A Related Products

	X930A	N80930AD4	8X930AX
Description	UNIVERSAL SERIAL BUS MICROCONTROLLER	UNIVERSAL SERIAL BUS MICROCONTROLLER	UNIVERSAL SERIAL BUS MICROCONTROLLER

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