mySmartUSB MK2b

USB programmer and communication interface for AVR microcontrollers

mySmartUSB MK2b is designed in SMD and can be used as a daughter board on other boards, e.g. on products of the MK2 series from myAVR without own power supply or individually as AVR910/AVR911/STK500/myMode compatible programmer. Communication with the PC is completely transparent via a virtual serial port. The board is connected to the PC via a USB interface and supplied with power. A large number of AVR systems can be programmed with this board via the existing USB interface and communicate with a system via a UART USB bridge.
The firmware can be updated for new controller types and protocols via a pre-installed boot loader. In addition, mySmartUSB MK2b can serve as a basis for other applications, such as a UART-USB or TWI-USB converter.

overview and functional diagram

properties:

• ISP-programmer with USB-connection and integrated communication interface
  • programming of AVR microcontrollers in the target system
  • set fuse and lock bits
  • establishing serial data transmission between microcontroller and computer
  • communication via UART, TWI, I²C
• very simple and safe handling with ISP interface
  • controller does not need to be removed from the target environment for programming
  • no external power supply through a power supply unit or battery necessary
• firmware according to AVR AN910/AN911 and STK500 programming standard
• support of various 8-bit RISC processors with ISP interface of the AVR family
• switchable between programming and communication mode
• status display of the modes via LED
• power on and off switchable by user
• power supply of the target system can be provided via USB interface
  • can optionally take over the power supply of the target system from 3.3V or 5V and up to 80 mA
  • this voltage is sufficient for most test setups with simple input and output devices, no extra power supply such as power supply units or batteries required
• updateable via integrated bootloader
• Firmware with automatic step-down mode ( auto speed detect ) ⇒ possible reactivation of controllers that were clocked at frequencies below 1 MHz and could no longer be addressed at the standard ISP speed

features:

• in SMD-construction
• ISP-port
• USB-connection (mini USB)
• industry standard-controller (CP2102)
• quartz crystal 20 MHz
• dimensions: 60 × 30 × 12 mm
• grid dimension: 2.54 mm

technical data:

• supply voltage: 5V via USB
• operating current: 10 - 20 mA typical without other loads up to 100 mA if connected to target system
• operating temperature: 0 °C - 30 °C
• supported protocols: AVR910/11, STK500v2, myMode
• supported programming method: ISP
• supported controllers (excerpt):

  AT90PWM3 AT90S1200 AT90S2313 AT90S2343 AT90S4414 AT90S4433 AT90S8515 AT90S8535

  ATmega103 ATmega128 ATmega16 ATmega161 ATmega162 ATmega163 ATmega164P ATmega168 ATmega169 ATmega32 ATmega324P ATmega328P ATmega329 ATmega3290 ATmega48 ATmega64 ATmega644 ATmega8 ATmega8515 ATmega8535 ATmega88

  ATtiny12 ATtiny13 ATtiny15 ATtiny2313 ATtiny24 ATtiny25 ATtiny26 ATtiny44 ATtiny45 ATtiny84 ATtiny85

scope of supply:

• USB programmer with soldered 6-pin tub connector
• 6-pole ribbon cable with post connectors
• 2 × pin header 10 way, male, right angle (to connect the programmer with other boards)