1.1 Features 12

• High-Performance, Low-Power, TMS320C55x™

Fixed-Point Digital Signal Processor

– 16.67-, 13.33-, 10-, 8.33-ns Instruction Cycle

Time

– 60-, 75-, 100-, 120-MHz Clock Rate

– One/Two Instructions Executed per Cycle

– Dual Multipliers [Up to 200 or 240 Million

Multiply-Accumulates per Second (MMACS)]

– Two Arithmetic/Logic Units (ALUs)

– Three Internal Data/Operand Read Buses

and Two Internal Data/Operand Write Buses

– Software-Compatible With C55x Devices

– Industrial Temperature Devices Available

• 256K Bytes Zero-Wait State On-Chip RAM,

Composed of:

– 64K Bytes of Dual-Access RAM (DARAM),

8 Blocks of 4K x 16-Bit

– 192K Bytes of Single-Access RAM (SARAM),

24 Blocks of 4K x 16-Bit

• 128K Bytes of Zero Wait-State On-Chip ROM

(4 Blocks of 16K x 16-Bit)

• 4M x 16-Bit Maximum Addressable External

Memory Space (SDRAM/mSDRAM)

• 16-/8-Bit External Memory Interface (EMIF) with

Glueless Interface to:

– 8-/16-Bit NAND Flash, 1- and 4-Bit ECC

– 8-/16-Bit NOR Flash

– Asynchronous Static RAM (SRAM)

– SDRAM/mSDRAM (1.8-, 2.5-, 2.75-, and 3.3-V)

• Direct Memory Access (DMA) Controller

– Four DMA With 4 Channels Each (16-

Channels Total)

• Three 32-Bit General-Purpose Timers

– One Selectable as a Watchdog and/or GP

• Two MultiMedia Card/Secure Digital (MMC/SD)

Interfaces

• Universal Asynchronous Receiver/Transmitter

(UART)

• Serial-Port Interface (SPI) With Four Chip-

Selects

• Master/Slave Inter-Integrated Circuit (I2C Bus™)

• Four Inter-IC Sound (I2S Bus™) for Data

Transport

• Device USB Port With Integrated 2.0 High-

Speed PHY that Supports:

– USB 2.0 Full- and High-Speed Device

• Real-Time Clock (RTC) With Crystal Input, With

Separate Clock Domain and Power Supply

• Four Core Isolated Power Supply Domains:

Analog, RTC, CPU and Peripherals, and USB

• Four I/O Isolated Power Supply Domains: RTC

I/O, EMIF I/O, USB PHY, and DVDDIO

• Three integrated LDOs (DSP_LDO, ANA_LDO,

and USB_LDO) to power the isolated domains:

DSP Core, Analog, and USB Core, respectively

• Low-Power S/W Programmable Phase-Locked

Loop (PLL) Clock Generator

• On-Chip ROM Bootloader (RBL) to Boot From

NAND Flash, NOR Flash, SPI EEPROM, SPI

Serial Flash or I2C EEPROM

• IEEE-1149.1 (JTAG)

Boundary-Scan-Compatible

• Up to 26 General-Purpose I/O (GPIO) Pins

(Multiplexed With Other Device Functions)

• 196-Terminal Pb-Free Plastic BGA (Ball Grid

Array) (ZCH Suffix)

• 1.05-V Core (60 or 75 MHz), 1.8-V, 2.5-V, 2.75-V, or 3.3-V I/Os

• 1.3-V Core (100, 120 MHz), 1.8-V, 2.5-V, 2.75-V,

or 3.3-V I/Os

1.2 Applications

• Wireless Audio Devices (Headsets, Microphones, Speakerphones)

• Echo Cancellation Headphones

• Portable Medical Devices

• Voice Applications

• Industrial Controls

• Fingerprint Biometrics

• Software Defined Radio

1.3 Description

The device is a member of TI's TMS320C5000™ fixed-point Digital Signal Processor (DSP) product family

and is designed for low-power applications.

The fixed-point DSP is based on the TMS320C55x™ DSP generation CPU processor core. The C55x™

DSP architecture achieves high performance and low power through increased parallelism and total focus

on power savings. The CPU supports an internal bus structure that is composed of one program bus, one

32-bit data read bus and two 16-bit data read buses, two 16-bit data write buses, and additional buses

dedicated to peripheral and DMA activity. These buses provide the ability to perform up to four 16-bit data

reads and two 16-bit data writes in a single cycle. The device also includes four DMA controllers, each

with 4 channels, providing data movement for 16-independent channel contexts without CPU intervention.

Each DMA controller can perform one 32-bit data transfer per cycle, in parallel and independent of the

CPU activity.

The C55x CPU provides two multiply-accumulate (MAC) units, each capable of 17-bit x 17-bit

multiplication and a 32-bit add in a single cycle. A central 40-bit arithmetic/logic unit (ALU) is supported by

an additional 16-bit ALU. Use of the ALUs is under instruction set control, providing the ability to optimize

parallel activity and power consumption. These resources are managed in the Address Unit (AU) and Data

Unit (DU) of the C55x CPU.

The C55x CPU supports a variable byte width instruction set for improved code density. The Instruction

Unit (IU) performs 32-bit program fetches from internal or external memory and queues instructions for the

Program Unit (PU). The Program Unit decodes the instructions, directs tasks to the Address Unit (AU) and

Data Unit (DU) resources, and manages the fully protected pipeline. Predictive branching capability avoids

pipeline flushes on execution of conditional instructions.

Serial media is supported through two MultiMedia Card/Secure Digital (MMC/SD) peripherals, four Inter-IC

Sound (I2S Bus™) modules, one Serial-Port Interface (SPI) with up to 4 chip selects, one I2C multimaster

and slave interface, and a Universal Asynchronous Receiver/Transmitter (UART) interface.

The device peripheral set includes an external memory interface (EMIF) that provides glueless access to

asynchronous memories like EPROM, NOR, NAND, and SRAM, as well as to high-speed, high-density

memories such as synchronous DRAM (SDRAM) and mobile SDRAM (mSDRAM). Additional peripherals

include: a high-speed Universal Serial Bus (USB2.0) device mode only, and a real-time clock (RTC). This

device also includes three general-purpose timers with one configurable as a watchdog timer, and an

analog phase-locked loop (APLL) clock generator.

Furthermore, the device includes three integrated LDOs (DSP_LDO, ANA_LDO, and USB_LDO) to power

different sections of the device. The DSP_LDO can provide 1.3 V or 1.05 V to the DSP core (CVDD),

selectable on-the-fly by software as long as operating frequency ranges are observed. To allow for lowest

power operation, the programmer can shutdown the internal DSP_LDO cutting power to the DSP core

(CVDD) while an external supply provides power to the RTC (CVDDRTC and DVDDRTC). The ANA_LDO is

designed to provide 1.3 V to the DSP PLL (VDDA_PLL) and power management circuits (VDDA_ANA). The

USB_LDO provides 1.3 V to USB core digital (USB_VDD1P3) and PHY circuits (USB_VDDA1P3). The RTC

alarm interrupt or the WAKEUP pin can re-enable the internal DSP_LDO and re-apply power to the DSP

core.

The device is supported by the industry’s award-winning eXpressDSP™, Code Composer Studio™

Integrated Development Environment (IDE), DSP/BIOS™, Texas Instruments’ algorithm standard, and the

industry’s largest third-party network. Code Composer Studio IDE features code generation tools including

a C Compiler and Linker, RTDX™, XDS100™, XDS510™, XDS560™ emulation device drivers, and

evaluation modules. The device is also supported by the C55x DSP Library which features more than 50

foundational software kernels (FIR filters, IIR filters, and various math functions) as well as chip support

libraries.