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AVR2016: RZRAVEN Hardware User's Guide
Features
8-bit
• Development kit for the AT86RF230 radio transceiver and AVR® microcontroller.
Microcontrollers
• CE, ETSI and FCC approved.
• LCD module (AVRRAVEN):
- AT86RF230 radio transceiver with high gain PCB antenna.
- Dual AVR microcontrollers.
Application Note
- Dynamic Speaker and microphone.
- Atmel Serial Dataflash®.
- User IO section:
• USART
• GPIO
• Relay Driver
- Powered by battery or external supply:
• 5
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2 General The RZRAVEN kit is built from one RZUSBSTICK module and two AVRRAVEN modules. See Figure 2-1 to Figure 2-4 for further details. The complete schematics and Gerber files are available from the compressed archive accompanying this application note. Figure 2-1 Assembly drawing AVRRAVEN - front view. Figure 2-2 Assembly drawing AVRRAVEN - back view. 2 AVR2016 8117D-AVR-04/08
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PCB Antenna AVR2016 Figure 2-3 Assembly drawing RZUSBSTICK - front view. Figure 2-4 Assembly drawing RZUSBSTICK - back view 3 The AVRRAVEN Module Figure 3-1 AVRRAVEN overview Joystick Audio LCD 2-way async 2-way sync and user I/O display Serial comm Serial comm I/O MCU #1: MCU #2: ATmega3290P, ATmega1284P, Radio chip User I/O RF Stacks AT86RF230 On-chip MCU On-chip MCU Realtime Realtime RC oscillator, RC oscillator, Clock oscillator Clock oscillator Set to 4MHz Set to 4MHz 16MHz
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3.1 AVR Microcontrollers Two AVR microcontrollers are found on the AVRRAVEN module. An ATmega1284P is connected to the AT86RF230 radio transceiver, and an ATmega3290P is driving the LCD. Both these devices are selected from the AVR picoPower family, something that ensures minimal power consumption and operation down to 1.8 Volts. Universal Synchronous and Asynchronous serial Receiver and Transmitter (USART) is used as an inter processor communication bus. 3.2 Atmel Radio Transceiver Th
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AVR2016 3.5 Speaker An 8 Ω speaker is provided. The ATmega3290P controls all audio. The signal source is the TIMER1’s PWM output and the signal is shaped via a low-pass filter and amplified by a Class-D amplifier. Pulling PORTE7 low activates the active filter and providing a PWM signal on PORTB5 activates the amplifier. 3.6 Microphone The AVRRAVEN’s microphone is connected to the ATmega3290P ADC channel 0. The signal is amplified and low-pass filtered. Pulling PORTE7 low activates th
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3.11 Power Supply The AVRRAVEN can be powered either from batteries or an external 5 to 12 Volts DC source. The power source is selected by the position of the jumper located immediately to the right of the LCD (See the figure below for a reference). Polarity protection is provided when using an external power source. The AVRRAVEN has been designed to run from two 1.5V LR44 battery cells. An onboard voltage regulator makes it possible to run power the AVRRAVEN from a 5 to 12 Volts DC
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AVR2016 3.12 Interfaces The AVRRAVEN module has multiple interfaces that can be used for serial communication, interaction with external sensors and control units such as relays and of course programming and debugging. Figure 3-3 AVRRAVEN User Interfaces Table 3-1. Interfaces available on J401 Pin number Function Comment 1 Ext. power supply, 5-12V input External power input 2 Ext. power supply 0V Connected to internal 0V 3 Relay coil positive Relay driver circuit positive 4 Relay
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3.12.1 Programming Interface Both the ATmega3290P and ATmega1284P can be programmed using either the JTAG or ISP interface. JTAG programming can be facilitated by connecting a JTAG ICE mkII to the 50-mil pin header J301 (ATmega3290P) and J204 (ATmega1284P). A total of 5 50-mil pin headers and one 50-mil to 100-mil converter are supplied with the RZRAVEN kit. ISP programming can be performed by connecting an ISP enabled AVR programming tool to the pin header J302 (ATmega3290P) and J205 (
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AVR2016 Table 3-3. ATmega1284P User IO ATmega1284P Port Pin PCB Connection Comment TWI SCL. PC0 J201-1 Connected to serial EEPROM TWI SDA. PC1 J201-2 Connected to serial EEPROM PC2 J201-3 JTAG TCK. PC3 J201-4 JTAG TMS. PC4 J201-5 JTAG TDO. PC5 J201-6 JTAG TDI. Populate R204 to connect to N.C. J201-7 PC6. RTC Xtal XC202 must then be removed. Populate R205 to connect to N.C. J201-8 PC6. RTC Xtal XC202 must then be removed. PD0 J202-1 RXD0 Inter processor communication.
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4 The AVR RZUSBSTICK Module Figure 4-1 RZUSBSTICK overview 2-way sync USB interface Serial comm MCU: AT90USB1287, Radio chip USB and RF Stacks AT86RF230 MCU oscillator 16MHz Xtal 8MHz Xtal The AVR RZUSBSTICK hardware is based a USB microcontroller and a radio transceiver chip. The AT90USB1287 microcontroller handles the USB interface, the AT86RF230 radio transceiver and the RF protocol stacks. For hardware details please refer to Appendix D for the complete AVR RZUSBSTICK schematics.
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AVR2016 4.4 Interfaces Figure 4-2 RZUSBSTICK Interfaces - front. Figure 4-3 RZUSBSTICK Interfaces - back 4.4.1 External Memory Interface When necessary the AT90USB1287’s 8k Bytes of internal SRAM can be extended through the AVR external memory interface. The suggested external SRAM is 32k Bytes and is available from address 0x8000 to 0xFFFF giving a total of 40k Bytes when assembled. Suggested latch and RAM: • 74AHC573PW. • BS62UV256TCP-10. 4.4.2 Serial Interface The USART on
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4.4.3 Programming Interface A JTAG interface is provided for the AT90USB1287 microcontroller. The interface is available through a 50-mil spaced 10-pin dual row header. The RZRAVEN does not come with the header mounted. So it is up to the user populating it. Wires could also be soldered in instead of the dual row headers. A total of 5 50-mil pin headers and one 50-mil to 100-mil converter are supplied with the RZRAVEN kit. 4.4.4 LEDs 4 LEDs is assembled on the board: Table 4-1. AT90USB
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AVR2016 5 Appendix A: AVRRAVEN Schematics 13 8117D-AVR-04/08
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6 Appendix B: AVRRAVEN Bill of materials Table 6-1. AVRRAVEN BOM Qty Designator Description Manufacturer Part # 5 C205, C206, Ceramic capacitor, SMD 1.2p C207, C220, 0402, NP0, 50V, +/- C221 0.25pF Ceramic capacitor, SMD 2 C201, C204 12p 0402, NP0, 50V, +/-5% C413, C414, Ceramic capacitor, SMD 3 100p C415 0402, NP0, 50V, +/-10% Ceramic capacitor, SMD 1 C404 4.7n 0402, X7R, 25V, +/-10% C208, C301, 14 Ceramic capacitor, SMD 10n C405, C407, 0402, X7R, 25V, +/-10% C408, C409,
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AVR2016 Qty Designator Description Manufacturer Part # Thick film resistor, SMD 1 R410 3.3k 0402, 1/16W, 1% R202, R206, Thick film resistor, SMD 17 10k R210, R211, 0402, 1/16W, 1% R212, R301, R302, R307, R402, R406, R407, R408, R421, R422, R423, R424, R503 1 R305 Thick film resistor, SMD 47k 0402, 1/16W, 1% 10 R308, R309, Thick film resistor, SMD 100k R310, R409, 0402, 1/16W, 1% R416, R419, R426, R429, R501, R504 3 R403, R418, Thick film resistor, SMD 470k R420 04
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Qty Designator Description Manufacturer Part # TS2007 3W class D audio 1 U403 ST TS2007IQT amp. 32.768kHz SMD crystal, 2 XC202, XC301 Rakon Ltd LF XTAL016207 85SMX style PC board speaker, SMD 1 SP401 Veco Vansonic 20CS08KQ-150ND mount 16MHz uXtal GSX-323, 1 XC201 Golledge GSX-323/111BF 16.0MHz 2.0 x 2.5 mm SMD 10ppm Citizen 4.2x4.2mm SMD 1 U401 Citizen CHM-04C-03 electmic ALPS 4-directional switch 1 SW301 ALPS SKRHABE010 with center push function 1 PCB101 AVRRAVEN PCB A08-040
