TUSB2136 datasheet(7/50 Pages) TI

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1 Introduction

The TUSB2136 is an integrated universal serial bus (USB) 1.1 hub with a keyboard I/O controller. This makes it an

ideal solution for a compound USB keyboard with built-in hub device. The TUSB2136 has 8k

× 8 RAM space for

application development. A ROM-based version of the TUSB2136 has 8k

× 8 ROM space for predeveloped

customer-specific production applications. In addition, the TUSB2136 is programmable and can be used for various

other general USB controller applications. Unique vendor identification and product identification (VID/PID) can be

selected without the use of an external EEPROM. Using a 12-MHz crystal, the onboard oscillator generates the

internal system clocks. No additional programming is required for any part of the hub functions. The device can be

programmed via an inter-IC (I2C) serial interface at power on from an EEPROM, or optionally, the application firmware

can be downloaded from a host PC via USB. The 8052-based microprocessor allows several third-party standard

tools to be used for application development. In addition, the application code available in the general market can

also be used (this may or may not require some code modification due to hardware variations).

1.1

Features

•

Multiproduct support with one code and one chip (up to 16 products with one chip)

•

Fully compliant with the USB release 1.1 specification

•

Supports 1.5 and 12 Mbits/s USB data rates

•

Supports USB suspend/resume and remote wake-up operation

•

Integrated two-port hub with individual power management per port

•

Integrated 8052 microcontroller with:

–

256

× 8 RAM for internal data

–

× 8 RAM code space available for downloadable firmware from host or I2C port. [1]

–

512

× 8 shared RAM used for data buffers and endpoint descriptor blocks (EDB) [2]

–

Four 8052 GPIO ports, ports 0,1, 2 and 3

–

Master I2C controller for external slave device access

–

Watchdog timer

•

Operates from a 12-MHz crystal

•

On-chip PLL generates 48 MHz

•

Supports a total of 3 input and 3 output (interrupt, bulk) endpoints

•

Power-down mode

•

64-pin TQFP package

[1] The TUSB2136 has 8K x 8 RAM for development. 8K x 8 ROM version available. Contact TI Marketing

[2] This is the buffer space for USB packet transactions.

TUSB2136 数据表(PDF) 7 Page - Texas Instruments

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