GW-USB-06
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User_Guide_GW-USB-06_160122
Page 4
Hardware
GW-USB-06 consists of main MCU, memories and the TR-72D compatible circuitry with RTCC added. Firmware of the main
MCU is fixed. Specific functionality of the device can be implemented by user application software for the TR transceiver
inside. This (except of RTCC usage) can also be developed using the CK-USB-04A development kit. For detailed information
refer to CK-USB-04A User's guide.
Power supply
GW-USB-06 is intended to be supplied from a host via USB connector. LDO voltage regulator converts 5 V from USB to
3.3 V for all internal circuitry. RTCC has a temporary backup by decoupling capacitors, see below (RTCC).
Reset
Reset can be invoked by connecting a disconnected GW-USB-06 to USB or by the Reset USB Device command in CDC
IQRF mode. Actual reset is executed ~5 s after the command is issued. This delay allows to disconnect USB communication
on host side in time. See the
CDC Implementation in IQRF USB devices
User's guide.
USB
GW-USB-06 supports Custom device and three types of CDC USB modes. Proper USB driver(s) must be installed in the
host device. Refer to the
IQRF USB drivers Installation guide
if needed.
TR transceiver
Wireless IQRF transceiver compatible with TR-72D, without temperature sensor. Refer to the TR-72D datasheet for details.
Antenna
PCB antenna on GW-USB-06 board.
RTCC
Real-time clock
/
calendar MCP7940NT by Microchip shares the I2C serial bus with serial EEPROM. It can be controlled from
TR transceiver. Decoupling capacitors ensure RTCC backup for 30 s after disconnecting power supply which allows to quickly
replug the device from one host USB to another keeping the RTCC running.
RTCC is supported by demo RTCC example available on
www.iqrf.org/GW-USB-06
product page.
Serial Flash memory
8 Mb Flash memory SST25VF080B-80-4I (by SST) with serial SPI interface is connected to main MCU. It is not supported
in current firmware version, reserved for future use and optional on request.
LEDs
LED1 (red) and LED2 (green) are dedicated to TR transceiver (compatible with LEDs on discrete TR transceivers). LED 3
indicates USB modes and other status information.
