Datalogic S r l 0021 Star Module PLUS Small 910MHz User Manual StarModulePlus910 1 2

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Document ID	1403634
Application ID	vo/0MsTnlrF8atwCgUCgtA==
Document Description	User Manual
Short Term Confidential	No
Permanent Confidential	No
Supercede	No
Document Type	User Manual
Display Format	Adobe Acrobat PDF - pdf
Filesize	25.49kB (318658 bits)
Date Submitted	2011-01-12 00:00:00
Date Available	2011-01-12 00:00:00
Creation Date	2010-12-22 11:06:27
Producing Software	GPL Ghostscript 8.63
Document Lastmod	2010-12-22 11:06:27
Document Title	StarModulePlus910_1_2
Document Creator	PDFCreator Version 0.9.6
Document Author:	pgperuzzi

STAR-Module Plus 910 MHz
Preliminary
Rev 1.1
Integration Guide
Author:
Pier Giorgio Peruzzi
StarModulePlus910_1_2.d Revision: 1.2
oc
22/12/2010
Confidential
DATALOGIC PROPRIETARY INFORMATIONS
page 1 of 1
SmallSTAR-Module 910
Document History
Rev 1.1 FW release 1.35
Introduction………………………………………………………………………………….2
Pinout………………………………………………………………………………………….3
Electrical characteristics……………………………….……………………………………3
RF chracteristics…..…………………………………………………………………………4
Timings…………………………………………………………………………………………4
Block diagram…………………………………………………………………………………4
Basic module states………………………………………………………………………….5
Regulatory :
This device complies with Part 15 of the FCC Rules. Operation is subject to the following
two conditions:
1) This device may not cause harmful interference, and
2) This device must accept any interference received, including interference that
may cause undesired operation.
Any change or modification to the product not expressly approved by Datalogic Scanning
Group S.r.l. could void the user' s authority to operate the device.
This device complies with Industry Canada licence-exempt RSS standard(s). Operation is
subject to the following two conditions: (1) this device may not cause interference, and (2)
this device must accept any interference, including interference that may cause undesired
operation of the device.
Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils
radio exempts de licence. L'exploitation est autorisée aux deux conditions suivantes : (1)
l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter
tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en
compromettre le fonctionnement.
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DATALOGIC PROPRIETARY INFORMATIONS
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SmallSTAR-Module 910
Introduction
The STAR-Module Plus 910 is an FSK RF half-duplex transceiver working at 910 MHz.
Its main features are:
• FSK Frequency Shift Keying Modulation
• Default RF baud rate 36864 bps Manchester encoded
• UART baud rate : 38400 8 n 1 bps
• Extended 5.5 to 3.1 V power supply
• Temperature range –20°C / +55°C
• High RF frequencies precision, due to utilization of a PLL synthesizer
• Factory calibration parameters saved on write protected flash block
• Factory pre-loaded unique 32 bit mac address for each module
• RF front-end with SAW filter for high out-of-band noise rejection and low spurius level emission
• On-board temperature sensor for frequency drift compensation.
• Bootloader for in circuit firmware upgrade
• Sub-milliampere sleep mode
• On-board EEPROM for configuration parameters
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DATALOGIC PROPRIETARY INFORMATIONS
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SmallSTAR-Module 910
Pin
Direction
Description
J1
RF CONNECTOR
GROUND
Output
CD# (active low)
Input
IDLE
Output
TX_DATA
Input
RX_DATA
GROUND
Vdc (3.1 to 5.5 V)
Input
RESET_
GROUND
IDLE
HIGH
Sleep Mode
Function
LOW
Rx mode – Data received sent on TX_DATA, CD# asserted means RF channel is busy
Electrical characteristics
Description
TX mode current
RX mode current
IDLE mode current
@ 3.3 V
18
16
32
@5
31
21
52
Unit
mA
mA
uA
RF characteristics
Description
TX/RX center frequency
FSK modulation frequency deviation
RX bandwidth
Output power (50 Ohm load, typ )
RX Sensitivity (PER < 10% @36864 baud)
CD# threshold
CD# threshold hysteresys
RF in/out impedance
Frequency drift from –25 to +55°C
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Typ
910
+/-100
500
-1.0
-95
-80
10
50
+/- 50
Confidential
DATALOGIC PROPRIETARY INFORMATIONS
Unit
MHz
kHz
kHz
dBm
dBm
dBm
dBm
Ohm
ppm
page 4 of 4
SmallSTAR-Module 910
Block diagram
Blocks description:
• Reset supervisor: the microcontroller is reset when power supply falls below 3.0 V
• Temperature sensor: 10kOhm NTC
• Microcontroller: Atmel ATMega8L with RISC AVR core, 8kB Flash, 1kB SRAM, 512 B EEPROM,
ADC, UART, I2C controller, 8MHz internal clock oscillator
• RF Transceiver: Infineon TDA5252 with PLL synthesizer (reference oscillator 18.958333MHz)
• Analog RX baseband circuitry: processing of analog signal from transceiver demodulator to uC
ADC
• RF Front End: SAW filter, PIN-diode based RX-TX switch
Basic module states
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DATALOGIC PROPRIETARY INFORMATIONS
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SmallSTAR-Module 910
RF interface
StarModuleSLC910 has 50 Ohm impedance on RF out in TX and RX mode, therefore impedance
matching is required for antenna system of host.
Care must be taken for the proximity of conductive materials or the user’s hand that will cause a
mismatch of the antenna, decreasing the transceiver RF characteristics.
Moreover, care must be taken to ensure that the host system doesn’t have spurious emissions in the
range 910MHz+/-200kHz, that could cripple receiver sensitivity: it is advised to put a ground plane
under the RF module and to filter the power supply.
Noisy parts, like system buses, must be shielded in order not to irradiate spurious fields.
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DATALOGIC PROPRIETARY INFORMATIONS
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SmallSTAR-Module 910
Integration Examples
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DATALOGIC PROPRIETARY INFORMATIONS
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