Pira.cz
PIRA32 Microcontroller
FM Broadcast Radio Data System Encoder MCU
with single communication port
DESCRIPTION
The PIRA32 Microcontroller forms a fully digital
Radio Data System encoder that has been
developed especially for FM broadcasting. It
implements physical and data-link layers and
supports extended set of RDS services.
All functions are controlled by the RS-232 interface.
The device supports optional I
2
C slave peripherals
such as EEPROM memory, RTC, LCD display or
digital potentiometer.
FEATURES
Single supply
Typical operating current: 9 mA @ 5 V
Minimum external parts
I
2
C bus for external peripherals like EEPROM,
real time clock, LCD or digital potentiometer
External TA and Program switch
Two indication LED outputs
Both stereo and mono operation possible
Built-in digital 19 kHz pilot tone PLL with
software phase shift adjustment
Parallel 8-bit D/A converter, 361 kHz sampling
rate (over-sampled)
Broadcast quality output signal
Only simple output filter required
RDS/RBDS signal:
conforms to CENELEC EN50067 / EN 62106
Continuous RDS transmission during all
operations
Firmware update capability
Communication bus:
RS-232, bidirectional
Baud rate: 1200 to 19200 Bd
Packages available: 28-Pin PDIP
28-Pin SOIC
TYPICAL APPLICATIONS
FM broadcast RDS encoders with single
communication port
RDS testing, research and development
Important Note:
This datasheet is not intended to be a complete PIRA32 system designer’s reference source.
For more information on the features, characteristics, control and use refer to these documents:
“PIRA32 RDS Encoder Technical Manual” (available online)
“PIRA32 LCD Display” (available online)
“PIRA32 Device Configuration” (optional, available on request)
“PIRA32 LCD Display Multiplexing” (optional, available on request)
The manufacturer is not liable for any damages, including but not limited to, lost profits, lost savings, or other
incidental or consequential damages arising out of the use of this product.
No part of this datasheet may be reproduced or transmitted in any form or by any means, electronic or
mechanical, including photocopying, recording or information storage and retrieval systems, for any purpose other
than the purchaser's personal use.
Information in this document is subject to change without notice.
Revision 2017-06-09
