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DNT90P Datasheet(PDF) 3 Page - Murata Manufacturing Co., Ltd. |
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DNT90P Datasheet(HTML) 3 Page - Murata Manufacturing Co., Ltd. |
3 / 7 page DNT90 Hardware The major components of the DNT90 include an RFM TRC103 900 MHz FHSS transceiver, and a low current 8-bit microcontroller. The DNT90 operates in the 902 to 928 MHz ISM band. There are three selectable hopping patterns providing compatibility with frequency allocations in North America, South America and Australia. The DNT90 also has two selectable RF output power levels: +16 dBm (40 mW) and +22 dBm (158 mW). The DNT90 receiver is protected by a low-loss SAW filter, providing an excellent blend of receiver sensitivity and out-of-band interference rejection that is especially impor- tant in outdoor applications. The DNT90 provides a variety of hardware interfaces. There are two serial ports plus one SPI port. Either the pri- mary serial port or the SPI port can be selected for data communications. The second serial port is dedicated to di- agnostics. The primary and diagnostic serial ports support most standard baud rates up to 250 kbps. The SPI port supports data rates up to 500 kbps. The DNT90 also in- cludes three ADC inputs, two DAC outputs, and six gen- eral-purpose digital I/O ports. Four of the digital I/O ports support an optional interrupt-from-sleep mode when con- figured as inputs. The radio is available in two mounting configurations. The DNT90C is designed for solder reflow mounting. The DNT90P is designed for plug-in connector mounting. DNT90 Firmware DNT90 firmware operates using hybrid Ad Hoc TDMA channel access optimized for periodic burst transmissions. DNT90 firmware operates “out of the box” using point-to- point transparent serial mode, with point-to-multipoint, peer-to-peer and store & forward system topologies also supported. DNT90 firmware provides the user with a rich set of config- uration options including a choice of hopping patterns, hopping dwell times, serial and/or SPI data port operation, serial and SPI data rate selection, RF output power selec- tion, plus configurable analog and digital I/O lines. Data integrity is protected by 24-bit error detection, with optional ACK and automatic transmission retries or redundant transmissions. 128-bit AES encryption provides a high level of data security for sensitive applications. Sensor net- works can take advantage of timer or event-based data reporting and remote node sleep cycling for extended bat- tery life. www.RFM.com E-mail: info@rfm.com Page3of7 © 2010-2012 by RF Monolithics, Inc. DNT90 - 11/06/12 1 8 1 9 2 0 2 1 2 2 2 3 1 7 1 6 2 4 2 5 2 6 1 5 1 4 1 3 1 2 1 1 1 0 9 8 7 6 5 D N T 9 0 B l o c k D i a g r a m 2 7 M i c r o c o n t r o l l e r 4 3 2 1 R e g G N D A C T ( D I A G _ T X ) / D C D ( D I A G _ R X ) G P I O 0 R A D I O _ T X D R A D I O _ R X D G P I O 4 ( / H O S T _ C T S ) G P I O 5 ( / H O S T _ R T S ) D A C 0 G P I O 2 G P I O 1 G P I O 3 ( D A V ) D A C 1 V C C G N D + 3 . 3 V 2 8 2 9 3 0 T R C 1 0 3 I R Q 0 I R Q 1 / D C L K D A T A P L L _ L O C K S C K S D I S D O n S S _ D A T A n S S _ C O N F I G S A W F i l t e r a n d P o w e r A m p Figure 1 |
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