Overview

The iTouch QVGA Display System consists of an intelligent controller fitted to a 320x240 pixel colour display with touchscreen. The system is based on a powerful Microchip 16-bit PIC24FJ128GA010 microcontroller, which users can program with their own applications using an optional PX-200 programmer or one of Microchip's programmers/in-circuit debuggers.

Besides the display and touchscreen, the iTouch features seven 5V tolerant digital I/O lines, four analogue inputs, a UART configured for RS-232 communications, a UART connected to an FT232RL USB to serial converter for USB communications, a 25LC256 serial EEPROM, an SD/MMC card slot, a piezo speaker, plus a built-in TC1047 temperature sensor and two pushbutton switches.

The iTouch makes a low-cost way to implement many control applications where a high-quality user-friendly means of user input is required. The iTouch could be used as a standalone controller in many applications or as a user interface connected to some additional control system.

Features

• 2.8" QVGA 320x240 pixel colour display.
• Supports 262,144 colours.
• LED backlight.
• Touch-screen.
• Based on R61505 display controller from Renesas.
• 8-bit interfacing.
• Supports Microchip's library files.
• Main microcontroller is PIC24FJ128GA010 from Microchip.
• ICD jack for in-system programming of PIC (optional Inex PX-200 programmer recommended).
• Seven digital I/O lines (5V tolerant).
• Four analogue inputs (0V to +3.3V).
• UART1 of PIC24FJ128GA010 with Rx, Tx, CTS and RTS lines.
• UART2 of PIC24FJ128GA010 with USB to serial converter circuit based on FT232RL connected with CTS and RTS signals for hardware flow control.
• 25LC256 serial EEPROM for storing display configuration data and general purpose use.
• SD/MMC card slot and interface circuit.
• Piezo speaker with sound driver circuit.
• TC1047 temperature sensor.
• Two pushbutton switches with pull-up resistors for general-purpose input.
• 8MHz crystal and reset switch for PIC.
• 32.768kHz crystal for real-time clock and calendar (RTCC).
• Built-in 3.3V voltage regulator.
• Requires 4.8V to 9V DC power supply - can be connected using DC jack or screw terminals.
• Compact board size of 8cm x 6.4cm.

The iTouch requires a PIC programmer compatible with Microchip's MPLAB ICD2/3 for use. The Inex PX-200 is an ideal programmer and is sold separately - see accessories for details and to order.