- EZ-USB Series 2100 USB Controller Product Manual

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EZ-USB Series 2100 Family

The Anchor Chips EZ-USB™ family (AN21XX/AN23XX) provides

significant improvements over other USB architectures including an

enhanced 8051 core, 4 or 8 Kbytes of RAM, an intelligent USB core, and

high-performance I/O ports. The family includes 16 different products to

accommodate the needs of different systems.

The enhanced 8051 core provides five times the performance of the

standard 8051, while maintaining complete 8051 software compatibil-

ity. With on-chip RAM, firmware code can be downloaded from the

host PC. This allows the peripheral manufacturer to easily modify and

transfer new code to current and new users. This on-chip memory

eliminates the need for external memory.

The EZ-USB family supports high-bandwidth transfers by providing

an efficient mechanism to move data between external memory and

the USB FIFOs. Using this “turbo mode,” the 8051 core can transfer

1024 bytes of data in or out of an isochronous FIFO in 338 microsec-

onds. This leaves a high percentage of the bandwidth for the processor

to service the application. The EZ-USB family also supports an equiva-

lent data transfer rate for bulk packets of over 2 Mbytes per second,

which is more than the USB bandwidth.

The EZ-USB family conforms to the high-speed (12 Mbps) require-

ments of USB Specification version 1.0, including support for remote

wake-up. The internal SRAM replaces Flash memory, EEPROM,

EPROM, or masked ROM that is conventionally used in other USB

solutions.

The EZ-USB family offers two packages, a 44 PQFP and an 80 PQFP.

All EZ-USB devices are pin- and software-compatible. And, all RAM

versions have ROM equivalents to allow easy migration for high-

volume applications.

Features

Single-chip, low-power

solution for high-speed USB

peripherals

· Firmware downloadable

· High-performance I/O port

· Small board space (less than

1 square inch)

· 44 PQFP or 80 PQFP

· USB Specification 1.1

compliant

· Uses commercially-available

8051 software tools

· Thirty-one flexible endpoints

· All endpoints can be double

buffered

· 4 or 8 Kbytes of memory

· Five times the speed of a

standard 8051

· Supports composite devices

· I²C controller

· Supports isochronous, bulk,

control, and interrupt data

· On-chip PLL

EZ-USB Series 2100

AN2121SC AN2321SC

AN2125SC AN2325SC

AN2126SC AN2326SC

AN2131SC AN2331SC

AN2135SC AN2335SC

AN2136SC AN2336SC

AN2131QC AN2331QC

EZ-USB™ Series 2100

USB Controller

Summary of content (16 pages)

PAGE 1
EZ-USB™ Series 2100 USB Controller EZ-USB Series 2100 Family Features · Single-chip, low-power solution for high-speed USB peripherals The Anchor Chips EZ-USB™ family (AN21XX/AN23XX) provides significant improvements over other USB architectures including an enhanced 8051 core, 4 or 8 Kbytes of RAM, an intelligent USB core, and high-performance I/O ports. The family includes 16 different products to accommodate the needs of different systems.
PAGE 2
Complete USB Design Made Easy Typical USB Implementation High-Speed Peripheral Anchor USB Solution I/O Shared Memory With the EZ-USB family, the peripheral designer gains two overall advantages: First, the design is much simpler because of the chip’s significant integration and built-in flexibility. Second, the EZ-USB architecture reduces software code significantly over other USB solutions. This combination gives users a quick and easy path toward obtaining a working prototype.
PAGE 3
EZ-USB Series 2100 Features Benefits Single-Chip Solution Lower overall system cost Minimum board space with 44 PQFP and 80 PQFP packages Quicker design and faster time to market than other USB solutions Minimal design resources RAM Architecture Quick changes in firmware and driver code Updates in the field via software downloads Flexibility in multiple configurations Dynamic changes in performance/properties based on user’s needs High-Performance I/O Transfers a full 1024-byte isochronous packet wit
PAGE 4
Unprecedented “Soft” Architecture Soft Configuration Host PC The focus of the EZ-USB family is to provide the peripheral designer a multitude of design configurations and migration paths. The “soft,” programmable nature of the EZ-USB architecture provides flexibility while minimizing risks. Anchor Chips USB Controller Now it’s easy. Code Download RAM USB requires synchronization between four major technology suppliers: operating system, UHCI/OHCI interfaces, hub controllers, and peripheral devices.
PAGE 5
EZ-USB Series 2100 Enumeration and ReNumeration Anchor Chips’ proprietary ReNumeration™ function is the means by which the enhanced 8051 firmware is downloaded. How It Works Upon power-up or plug-in, the EZ-USB chip automatically enumerates as a default USB device. This allows the USB core to download 8051 code. The USB core logic inside EZ-USB performs this initial enumeration and code download while holding the 8051 in reset.
PAGE 6
Automatically Handles Low-Level USB Overhead A USB hardware connection is simpler than current interface standards (ISA, PCI, serial, parallel, and SCSI). For example, there are no IRQs or DMAs to set. USB does not use direct connections like RS232 or EPP (Enhanced Parallel Port). Instead, USB is a packetized protocol similar to telecommunication standards such as X.25 or frame relay. This makes software development complex. The EZ-USB chip family reduces the complexity of USB.
PAGE 7
EZ-USB Series 2100 Comparison of Standard USB Request “Get Descriptor” Conventional Method 1 USB Setup data copied to FIFO 2 CPU copies FIFO data to RAM; decodes Get Descriptor request 3 CPU transfers first packet of data from memory to endpoint FIFO 4 FIFO data sent in response to USB IN token 5 CPU transfers next packet of data from memory to endpoint FIFO 6 FIFO data sent in response to USB IN token 7 Repeat steps 5-6 This diagram shows how conventional USB controllers handle a three-stage
PAGE 8
Turbo Performance The EZ-USB family provides the maximum performance specified for USB. This allows the peripheral manufacturer to take advantage of USB’s full bandwidth in highspeed applications such as full-motion video, continuous audio, scanning, digital photography, and printing. To make full use of the USB bandwidth, the EZ-USB family has large endpoint buffers and a fast method for transferring data into and out of the buffers.
PAGE 9
EZ-USB Series 2100 To write data to outside logic, the 8051 loads a data pointer with a USB FIFO register address, and then executes a “movx a,@dptr” instruction to move a byte from the FIFO to the 8051 accumulator. The EZ-USB core simultaneously broadcasts the FIFO data on the external data bus pins and generates the external write signal FWR# (Fast Write). A 24 MHz clock is provided for use as an external FIFO clock, if required.
PAGE 10
Flexible for Many Applications Options for Loading 8051 Firmware The EZ-USB family provides the peripheral developer with four options for loading its 8051 firmware. The EZ-USB architecture includes features that give the designer many options for creating an efficient and effective design that is tailored to the needs of an application. Software file from the host system Loading from a software file provides the maximum flexibility to the peripheral manufacturer.
PAGE 11
EZ-USB Series 2100 Thirty-one Endpoints for Ultimate Flexibility More Endpoint Buffer Memory The EZ-USB chip supports more endpoints and provides more endpoint buffer memory than any other USB-device solution in the market. The USB specification describes an endpoint as a source or sink of data. In the EZ-USB chip, endpoints are constructed as RAM (bulk, control, interrupt endpoints) or FIFOs (isochronous endpoints).
PAGE 12
EZ-USB Series 2100 Xcelerator Development Kit The EZ-USB Xcelerator™ development kit provides a complete hardware and software solution for accelerating the firmware and device driver development for all the members of the EZ-USB family. Other USB development kits use emulation of the eventual USB device. The EZ-USB Xcelerator developer kit uses the actual device, the AN2131QC, during the entire development.
PAGE 13
EZ-USB Series 2100 Anchor Utilities Anchor Chips provides the best tools to accelerate the developer’s firmware development. The USB Control Panel allows the developer to send and receive interrupt, bulk, and isochronous packets and standard USB device requests without first developing the hostbased driver for the specific application. The USB Control Panel provides manual control of USB host controller response.
PAGE 14
Packages and Pin Definitions 13.45 12.95 10.10 9.90 8.00 REF 44 34 33 1 0.80 BSC. 1.95 2.10 44 PQFP 23 11 0o~7o 0.25 0.10 0.23 0.13 12 0.95 0.65 22 1.60 TYP 44-Pin Lead Detail 2.35 MAX 0.45 0.30 24.10 23.70 20.05 19.95 0.80 64 40 0.80 BSC. 8 Places 12o REF. 2 .6 6 3.0 14.05 13.95 0 .2 5 G a ge P lan e 18.10 17.70 0o~10o 2 .7 6 3 .0 65 41 80 PQFP 80 25 0o~7o Base Plane 0.28 0.18 1.00 0.80 1.95 + 0.15 24 1.00 R ef Seating Plane 1 80-Pin Lead Detail 3.04 MAX 0.42 0.
PAGE 15
EZ-USB Series 2100 A dd r es s In p u t /Ou t p u t 2125SC 2126SC 2135SC 2136SC 2121SC 2131SC 2131QC Name 2125SC 2126SC 2135SC 2136SC 2121SC 2131SC 2131QC Name 68 PA0/T0out 7-12 A0-A5 69 PA1/T1out 15, 16 A6, A7 70 PA2/OE# 26-29 A8-A11 71 PA3/CS# 34-37 A12-A15 39 39 73 PA4/FWR# 40 40 74 PA5/FRD# 75 PA6/RxD0out 76 PA7/RxD1out 24 44 PB0/T2 25 45 PB1/T2EX 26 46 PB2/RxD1 27 47 PB3/TxD1 32 32 61 BKPT 28 52 PB4/INT4 2 2 4 CLK24 29 53 PB5/INT5# 43 43
PAGE 16
Ordering Information With the broadest family of USB solutions in the market, peripheral manufactures can find the right combination of features, board space, and price to fit their applications. All eight of EZ-USB family members with internal RAM can be converted to ROM equivalents with no changes in their design.