FAQ | Low Power Wireless 802.15.4 | Hardware

The UART0 (TXD0 and RXD0) is available on the 6-pin connector of the deRFtoRCB Adapter and STB.

The deRFmega128 is populated with the Two-wire Serial EEPROM 'AT24C1024B' from Atmel. The TWI address is hardwired by the Pins A1 and A2. This becomes important if the user wants to extend the TWI bus by additional devices. More detailed information and the datasheet can be found at www.atmel.com. The external wiring of the EEPROM is depicted in section 10 of the deRFmega128 User Manual.

Yes. This assembly variant is available in two flavours: Either the RFmega128-22A07 with U.FL connector or the deRFmega128-22A08 with chip ceramic antenna. Because of the missing external circuitry of the EEPROM the following signals may be used as desired by the user:

• PD0 -> INT0/SCL (External Interrupt0 Input or TWI Serial Clock)
• PD1 -> INT1/SDA (External Interrupt1 Input or TWI Serial Data)
• PD6 -> T1 (Timer/Counter1 Clock Input)
The pins listed above are directly connected to the MCU. More information: info@dresden-elektronik.de

There are two different crystal oscillators for clock generation:

• 16 MHz crystal (connected to XTAL1 and XTAL2)
• 32,768 kHZ crystal (connected to TOSC1 and TOSC2)

Please take a look at the deRFbreakout Board. All electrical connectors are easily accessible through screw terminals. JTAG and TRACE can be accessed through the usual 2.54mm pin headers. The deRFbreakout Board can be used for all dresden rf modules.

No, the supply voltage VCC must not be more than 3.6 VDC.

VCC = 3.3 VDC
Therefore it is possible to connect external sensors if they have the same operating voltage range.

Yes, you can find these and other documents at “downloads” on the product page. Schematics are available for the following items:

Evaluation modules - Radio Controller Boards

• Radio Controller Board RCB230 V3.2
• Radio Controller Board RCB230SMA V3.3.1
• Radio Controller Board RCB231 V4.0.2
• Radio Controller Board RCB231ED V4.1.1
• Radio Controller Board RCB212SMA V5.3.2
• Radio Controller Board RCB128RFA1 V6.3.1
• Radio Controller Board RCB231LPA V4.3.2

Transceiver modules - Radio Extender Boards

• Radio Extender Board REB230 V2.3
• Radio Extender Board REB231 V4.0.2
• Radio Extender Board REB231ED V4.1.1
• Radio Extender Board REB212 V5.0.2

Development Boards

• deRFnode for ARM
• deRFnode for AVR/ARM
• deRFgateway for ARM
• deRFbreakout Board
• STB Sensor Terminal Board (RCB Terminal Board)
• RCB Breakout Board
• RCB Breakout Board light

Accessories

• deRFtoRCB Adapter
• SAM-ICE Adapter
• RS232 Level Shifter
• REBtoSTK600 Adapter

Notes:

• Some of the schematics are included in the corresponding user manual.
• Schematics for radio modules and usb sticks are not available.

RCB230 V3.1 is equipped with the AT86RF230 rev. A. This type is deprecated and has several bugs, for example unreliable auto modes. All bugs are listed in the Errata Sheet 'doc5131' of the AT86RF230 (see www.atmel.com). RCB230 V3.2 is equipped with rev. B, the majority of the bugs being fixed.

AVR-based (RCBs, deRFmega128 series):

with JTAG-Interface:

• Atmel AVR JTAGICE mkII (Programmer + Debugger)
• Atmel AVR Dragon (Programmer + Debugger)

with ISP-Interface:

• Atmel AVRISP mkII (Programmer)

ARM-based (USB radio sticks):

• Atmel AT91SAM-ICE JTAG Emulator (Programmer + Debugger)
• Segger J-Link (Programmer + Debugger)
• Amontec JTAGkey (Programmer + Debugger)
• OpenOCD USB Adapter: z.B. von In-Circuit (Programmer + Debugger)

Yes, you can for example with Atmel AVRISP mkII (firm ware V1.13). As a programming software AVR StudioV4.18.700 (SP1 + SP2) can be used for example. Unfortunately neither on the STB nor on the deRFtoRCB adapter the 6-pin connector can be used. The connection between module and ISP programmer has to be arranged by oneself. The pins on the radio modules needed for the ISP are the following:

pin radio module	pin ISP jack
Pin 23 (DGND)	Pin 6 (GND)
Pin 17 (PDO/PB3)	Pin 1 (PDO)
Pin 15 (PDI/PB2)	Pin 4 (PDI)
Pin 13 (PB1/SCK)	Pin 3 (SCK)
Pin 5 (RSTN)	Pin 5 (Reset)
Pin 1 (VCC)	Pin 2 (VCC)

We recommend the usage of SAMTEC SLM-123-01-L-S. Those are compatible with deRFarm7 and deRFmega128. The part can be ordered from http://www.samtec.com

For both deRFarm7 and deRFmega128 SAMTEC TMS-123-02-L-S are used. You can order it from http://www.samtec.com

• SAMTEC TFM-115-02-S-D, available from Farnell (art. no. 1690087) or directly from http://www.samtec.com
• Tyco 5-104655-4, available from Farnell (art. no. 1106324) or from RS Components (art. no. 406-893)

At the moment step models of the radio modules are not available.