Mosaic embedded designs » Embedded controllers » Operator interfaces » QVGA embedded computer

QVGA ControllerTM
I/O-Rich Embedded Computer Sports Advanced Graphical User Interface

QVGA instrument front panel with touch screen monitor and human machine interface HMI

Notice: Legacy Product

The QVGA Controller is a legacy product not available for new customers. If you're looking for a HC11-based integrated touchscreen controller programmable in C or Forth, consider Mosaic's QScreen™ Controller, which is compatible with our all of our Wildcard™ Modular I/O Boards.

For existing customers looking for QVGA documentation, see a summary of specifications below, or find the full QVGA documentation on Mosaic's Documentation Web.

Block Diagram

block diagram of qvga instrument controller with touch screen control operator interface panel

Specifications

CPU

  • 16 MHz mc68hc11
  • 8 MB address space

Onboard Memory

  • 384K FLASH Memory
  • 256K RAM with 128K RAM optionally battery backed
  • 320 bytes EEPROM

Memory Expansion

Onboard memory expandable to

  • 768K FLASH Memory
  • 640K RAM with 128K RAM optionally battery backed
  • 16 or 64 Mbyte Wildcard compact flash mass memory

Interrupts

  • 21 interrupts support I/O subsystems

Real-Time Clock

  • Optional real-time clock (rtc)

Touchscreen/Display User Interface

  • High contrast CCFL white-on-blue monochrome LCD display with software controlled backlight and contrast
  • 5.7" diagonal (3.5" x 4.6"), 320 x 240 pixel display
  • High resolution transparent analog touchscreen with software controlled beeper for audible feedback

Digital Input and Output

  • 28 user-configurable I/O lines including:
    • 3 or 4 input capture functions
    • 4 or 5 output compare functions
    • Pulse accumulator
  • Four open-drain high-current outputs with onboard snubbers drive 150 mA continuously or 1 amp intermittently

Power

  • 8 to 24 VDC
  • 4 W
  • 0.5 W per Wildcard I/O module
  • Onboard regulation, EMI filter and surge protection

Communications

  • RS232 or RS485 hardware UART at up to 19.2 Kbaud
  • RS232 software UART at up to 4800 baud
  • Fast synchronous serial peripheral interface (SPI) at up to 2 megabaud

Digital to Analog Conversion

  • 8 channels of 8 bit multiplying D/A conversion, cascadable

Analog to Digital Conversion

  • 8 channels of 8-bit A/D at up to 100 kHz sampling rate
  • 8 channels single-ended or 4 channels differential 12-bit A/D at up to 30kHz sampling rate with unipolar (0 to +5V) or bipolar (-5 to +5V) input

Connectors

  • 40-pin digital I/O
  • 40-pin analog I/O
  • 38-pin supplemental digital I/O
  • 2, DB-9 serial ports
  • 10-pin serial communications
  • 10-pin power connector and modular power jack
  • 2, 24-pin Wildcard headers

Runtime Security

  • Watchdog timer and clock monitor

I/O Expansion

Modular Wildcards provide additional I/O for:

  • 16- or 24-bit resolution A/D
  • 12-bit D/A
  • Isolated AC or DC solid state relays
  • 16 or 64 Mbyte Compact Flash
  • Logic level, high voltage, and high current digital I/O
  • RS232, RS422 or RS485

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