1.
General Product Description
1.1
Introduction
The Atmel® ATA5831/2/3 is a highly integrated, low-power UHF ASK/FSK RF transceiver with an integrated AVR®
microcontroller. It is package and pin-to-pin compatible with the previous generation of RF devices (Atmel ATA5830N and
Atmel ATA5780N).
The Atmel ATA5831/2/3 is partitioned into three sections; an RF front end, a digital baseband and the low-power 8-bit AVR
microcontroller. The product is designed for the ISM frequency bands in the ranges of 310MHz to 318MHz, 418MHz to
477MHz and 836MHz to 956MHz. The external part count is kept to a minimum due to the very high level of integration in
this device. By combining outstanding RF performance with highly sophisticated baseband signal processing, robust
wireless communication can be easily achieved. The receive path uses a low-IF architecture with an integrated double
quadrature receiver and digitized IF processing. This results in high image rejection and excellent blocking performance. The
transmit path uses a closed loop fractional-N modulator with Gauss shaping and pre-emphasis functionality for high data
rates. In addition, highly flexible and configurable baseband signal processing allows the transceiver to operate in several
scanning, wake-up and automatic self-polling scenarios. For example, during polling the IC can scan for specific message
content (IDs) and save valid telegram data in the FIFO buffer for later retrieval. The device integrates two receive paths that
enable a parallel search for two telegrams with different modulations, data rates, wake-up conditions, etc.
The Atmel ATA5831/2/3 implements a flexible service configuration concept and supports up to 15 channels. The channels
are grouped into five service configurations with three channels each. Three service configurations are located in the
EEPROM. Two service configurations are located in the SRAM to allow on-the-fly modifications during IDLEMode via SPI
commands or application software. The application software is located in the flash for Atmel ATA5831 or in the ROM for
Atmel ATA5832. Highly configurable and autonomous scanning capability enables flexible polling scenarios with up to 15
channels. The configuration of the transceiver is stored in a 1024byte EEPROM. The SPI interface enables external control
and device reconfiguration.
Table 1-1. Program Memory Comparison of Atmel ATA5831/2/3 Devices
Device
Atmel Firmware ROM
24Kbyte
User Flash
User ROM
Atmel ATA5831
Atmel ATA5832
Atmel ATA5833
20Kbyte
-
24Kbyte
-
-
20Kbyte
-
24Kbyte
In the Atmel ATA5831 the internal microcontroller with 20Kbyte user flash can be used to add custom extensions to the
Atmel firmware. The Atmel ATA5832 provides 20Kbyte user ROM as a replacement for the 20Kbyte flash for high-volume
applications. The Atmel ATA5833 embeds only the firmware ROM without user memory.
The debugWIRE and ISP interface are available for programming purposes.
Compatibility to the Atmel ATA5780N, Atmel ATA5830N and Atmel ATA5781/2/3
The Atmel ATA5831/2/3 is pin-to-pin compatible with the Atmel ATA5830N transceiver, the Atmel ATA5780N receiver and
the Atmel ATA5781/2/3 receivers. The Rx performance of the receivers matches that of the transceivers.
ATA5831/ATA5832/ATA5833 [SUMMARY DATASHEET]
3
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