The PIC Flex 28 USB and PIC Flex 40 USB development systems have been designed for developer and hobbyist intending to leverage the features available in the 28 Pin or 40 pin USB Device family available from Microchip.

The systems are compact and efficiently laid out in a 9 cm x 8 cm PCB; includes onboard PSU, Communications interface, and additional footprints for devices extending the system’s flexibility.

Tracked power and ground connections enable quick, simple integration and usage. A standard RS232 communications interface is available with DB9 footprint. Standard ICSP interface enables the 16fxxx device to be reprogrammed in circuit.

Features :

• Full USB circuitry suitable for applications using USB PIC’s with 28 or 40 pin boards e.g. 18F2550, also included link to switch to allow switchable  boot into Microchip USB bootloader.
• Supports USB PIC's in 28 or 40 pin packages.
• Serial interfaces for standard 3/5 wire serial communications link selectable as DCE or DTE.
• LCD Module power connector and contrast trimmer.
• All I/O pins available on 0.1” pitch PCB matrix suitable for standard IDC connectors
• Prototyping area of 280 holes (10x28) on a 0.1” pitch. Large enough for an additional 40 pin DIP device and support circuitry. Including tracked Vcc and Gnd lines.
• 4 Switches and pull up resistors (with link to allow Switch 4 to drive the PIC reset pin).
• 4 LED's with resistors.
• 2 NPN and 1 PNP general purpose transistors with base resistors for driving relays or higher loads.
• Links provided to disconnect support circuitry and to allow for low power battery operation.
• Has on board 5V, 1A, regulator and full decoupling, although the board may be powered from the USB port.
• Power LED
• In Circuit Serial Programmer (ICSP) standard 6 pin connector
• 20MHz crystal oscillator

Manual

• Download Here.

USB:

The board is based on the PIC Flex 28/40 development boards, and is supplied fully built and tested together with a 18F2550/4550 device programmed with a communications port application. The LED’s may be wired to show USB status and the board can be plugged in and will install automatically as a COM port under Windows 2000, XP and Vista.

Microprocessor:

• Supplied with pre-programmed 18F2550/4550 device.

• Oscillator Options:

• Supplied with 20MHz crystal oscillator.

• Power Supply Options:

• Supplied configured for operation from the USB power supply by optional link.
• TO-220 voltage regulator and connector provided for external supply if required.
•   Power-on LED.

• User I/O Options:

• 4 push buttons. (1 wired for use with Microchip USB boot loader application)
• 4 LEDs. (2 may be wired for USB status)
• RS232 driver chip and DB9F connector for serial communications included.

Manual

• Download Here. (See section 7)

Costs

28 pin (18F2550) Built and Tested - £30.00 ($45.00) (Includes CD with manuals and drivers)

40 pin (18F4550) Built and Tested - £30.00 ($45.00) (Includes CD with manuals and drivers)

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