Features: • Highly Integrated Digital Device for DAB Receivers (Eureka 147)
• Utilizes the ARM7TDMI ® Core
High-performance 32-bit RISC Architecture
High-density 16-bit Instruction Set
Embedded ICE (In-Circuit Emulation)
128-kByte Program and Data RAM
• Utilizes TeakDSPCore®
16-bit Fixed-point Digital Signal Processing Core
High-performance Dual MAC Architecture
75 MHz Single Clock Design
• DAB OFDM Channel Demodulator and Decoder
Fully Integrated, Supports all DAB Functions and Modes
Full Data Rate of 1.8 Mbit Can Be Decoded
Proven Time and Frequency Synchronization with a Wide-range Parameter Set
Automatic Mode Detection (AMD)
Digital AFC (Frequency Tolerance < 0.5 Hz for Mode I)
Digital AGC with a Wide Gain Control Range
Demodulation and Decoding of up to 64 UEP/EEP Sub-channels
Support of Dynamic Multiplex Reconfiguration (DMR) without Mute State
Digital Zero-symbol Detection (FSYNCH Generation)
• Audio Source Decoder (ASD) and Data Decoder (DD)
On-chip De-interleaver Memory for Full 1.8 Mbit/s Decoding Data Rate
Programmable Fader
Programmable DRC
PAD Extraction
Two Independent Data Packet Mode Decoder
• Integrated High-density SRAM Supporting Time and Frequency De-interleaving
• 10 Msps High-speed Low-power Pipelined ADC
Supports Wide IF Range of 2.048 MHz to 50 MHz
Complex Bandpass Filtering
Optional SAW Filter Equalization
• ARM7TDMI Core User Software Extension
Audio Player MPEG3 Support
• Large Variety of Interfaces
I2S/SPDIF, SFCO, SSO, RDI, RS-232, USART
USB 2.0 Full Speed
Two USARTs
CAN 2.0A and 2.0B
• Master/Slave SPI Interface
Two Dedicated Peripheral Data Controller (PDC) Channels
8- to 16-bit Programmable Data Length
Four External Slave Chip Selects
• Simple Memory Concept, Only One External Flash Required
• Programmable Watchdog Timer
• Power Management Controller (PMC)
CPU and Peripherals Can Be De-activated Individually
Simple But Comfortable Gearing and Clocking Unit
• 32 User Programmable I/O Lines (PIO)
• Low-power Consumption for Portable Applications (3.3 V and 1.8 V)
• Robust LQFP128 Package, BGA121 Package
• Very Low External Component CountSpecifications
|
Parameters |
Symbol |
Min. |
Max. |
Unit |
| Operating free air temperature range for LQFP128 |
|
-40 |
+85 |
°C |
| Operating free air temperature range for BGA121 |
|
-10 |
+70 |
°C |
| Storage temperature |
TStg |
-60 |
+150 |
°C |
| DC supply voltage |
VDD18 |
-0.3 |
+1.95 |
V |
|
VDD33 |
-0.3 |
+3.6 |
V |
|
AVDD |
-0.3 |
+3.6 |
V |
| DC input voltage |
|
-0.3 |
+1.95 |
V |
DescriptionThe ATR2740 is a fully integrated processing unit which covers all DAB- (Eureka 147, ETS 300 401) related digital tasks like DAB OFDM demodulation and decoding, audio source decoding, data decoding and time, as well as frequency synchronization.
The device ATR2740 consists of a high-performance 32-bit RISC ARM7TDMI core, an additional TeakDSPCore, embedded memories, an Analog-to-Digital Converter (ADC), as well as a DAB channel demodulator and decoder IP and two independent audio source decoder engines. A large variety of interfaces, including USB, SPI, USART and RDI is provided.
The ATR2740 baseband processor is controlled by a standard ARM7TDMI core which is a very well-known controller. This allows the designers to work with standard tools, which results in reduced development costs and very fast time to market.
The ARM7TDMI core is designed to perform the DAB receiver tasks, MMI and further user software extensions such as MP3 decoding or data decoding.The ATR2740 is manufactured using Atmel's high-density CMOS technology. By com-bining all functions on one SoC (System-on-Chip), including a wide range of peripheral functions on a monolithic chip, the ATR2740 provides a highly flexible and cost-effective solution for DAB applications.
The advanced Atmel technology and the architecture of the ATR2740 enable maximum performance at a very low current consumption.
The wide flexibility offered by the ATR2740 is due to the large variety of interfaces sup-ported. For control functions, UART, USB, and SPI are available. As data interface an SSO, SFCO, US Band RDI interfaces as well as two audio output (either I2S or SPDIF) are available.
Due to the high integration of the device ATR2740, the external component count is as low as only two external parts; a simple crystal and a 16-MB flash memory are required to run the full DAB function. All RAM, such as interleaving or program memory, as well as the ADC are incorporated into the device. The part works perfectly together with Atmel's DAB front-end parts.
The processing power available with the ATR2740 is sufficient to enable the part to decode the full DAB data rate of 1.8 Mbits. In additon, there is still unused processing power available on the ARM7TDMI controller for customer software. It is easy to run a complete MP3 player without the need to add extra hardware to the device.A complete set of tools for hardware and software, including documentation that allows easy design-in and a fast time to market, is available on request.
ATR2740 Data Sheet
