Technical Documentation

Here you can find some specific information on certain qualities the Prizm possesses, along with hardware specifications (the technical specs of the device) and attributes.

Basic Specifications #

  • Display

    • Type: Blanview LCD (Hyper Amorphous Silicon TFT), a Renesas R61524
    • OS Resolution: 384×216 pixels
    • Hardware Resolution: 396×224 pixels (confirmed here)
    • OS “Homescreen” Resolution: 21×8 characters including top toolbar’s space
  • Processor

    • 58MHz (overclockable within certain limits) Renesas SH4-A family SH7305 unit in big-endian mode
      • RTC unit of a SH7720 base
      • Lack of hardware FPU unit
  • Memory

    • User ROM: 16 MiB
    • Total ROM: 32 MiB
    • User RAM: 61 KiB
    • Total RAM: 2 MiB
  • I/O

    • USB port: USB 2.0 mini-B (OS supports MSD mode for connection to a computer)
    • Serial port: 2.5 mm 3-pin
    • Keyboard: 50 key dome-switch keyboard + reboot pin-hole button on the back + internal OS update contacts
  • Power

  • Physical Specs

    • Size: 2.06 cm × 8.95 cm × 18.85 cm / 0.81” × 3.52” × 7.42”
    • Weight: 230 g / 0.51lb with batteries


Pictures of the inside #

Here are links to some pictures of the inside (mostly just the main board) of various Prizms.

  • flyingfisch’s Prizms
    • First fx-CG 10 (no visible hardware damage), hardware V02 (really low-resolution, ignore the screw markings): picture
    • Second broken fx-CG 10 (no visible hardware damage), hardware V03: picture
    • Third broken fx-CG 10 (no visible hardware damage), hardware V03: picture
  • krazylegodrummer56 broken fx-CG 10 (no visible hardware damage), hardware V03: bottom, top.
  • gbl08ma’s repaired fx-CG 20: looks like a poor repair job from Casio’s service center in a south European country. It was originally a fx-CG 20, died due to broken bootloader, was repaired under warranty and got its main board replaced with one of hardware version 04 but model fx-CG 10. The LCD controller is still the old version; the new main board also lacks the two big capacitors (they forgot to solder them to the new main board?). As of November 2014, the calculator still worked fine. picture 1, picture 2, picture 3, picture 4.