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TAS1020B Datasheet(PDF) 10 Page - Texas Instruments |
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TAS1020B Datasheet(HTML) 10 Page - Texas Instruments |
10 / 118 page TAS1020B SLES025B – JANUARY 2002 – REVISED MAY 2011 www.ti.com 1.2 Description The TAS1020B integrated circuit (IC) is a universal serial bus (USB) peripheral interface device designed specifically for applications that require isochronous data streaming. Applications include digital speakers, which require the streaming of digital audio data between the host PC and the speaker system via the USB connection. The TAS1020B device is fully compatible with the USB Specification Version 1.1 and the USB Audio Class 1.0 Specification. The TAS1020B uses a standard 8052 microcontroller unit (MCU) core with on-chip memory. The MCU memory includes 8K bytes of program memory ROM that contains a boot loader program. At initialization, the boot loader program downloads the application program code to a 6,016-byte RAM from either the host PC or a nonvolatile memory on the printed-circuit board (PCB). The MCU handles all USB control, interrupt and bulk endpoint transactions. DMA channels are provided to handle isochronous endpoint transactions. The USB interface includes an integrated transceiver that supports 12 Mb/s (full speed) data transfers. In addition to the USB control endpoint, support is provided for up to seven IN endpoints and seven OUT endpoints. The USB endpoints are fully configurable by the MCU application code using a set of endpoint configuration blocks that reside in on-chip RAM. All USB data transfer types are supported. The TAS1020B device also includes a codec port interface (C-Port) that can be configured to support several industry standard serial interface protocols. These protocols include the audio codec (AC) '97 Revision 1.X, the AC '97 Revision 2.X and several inter-IC sound (I2S) modes. A direct memory access (DMA) controller with two channels is provided for streaming the USB isochronous data packets to/from the codec port interface. Each DMA channel can support one USB isochronous endpoint. An on-chip phase lock loop (PLL) and adaptive clock generator (ACG) provide support for the USB synchronization modes, which include asynchronous, synchronous and adaptive. Other on-chip MCU peripherals include an inter-IC control (I2C) serial interface, and two 8-bit general-purpose input/output (GPIO) ports. The TAS1020B device is implemented in a 3.3-V 0.25 µm CMOS technology. 10 Introduction Copyright © 2002–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TAS1020B |
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