UPD17068
Overview
- Program memory (ROM) : 24K bytes (12032 × 16 bits) Character ROM (CROM) : 4086 × 24 bits (255 characters) Data memory (RAM) : 1007 × 4 bits Video RAM (VRAM) : 672 × 4 bits (can be used for data memory) Address stack : 12 levels Interrupt stack : 2 levels Instruction execution time : 2 µs (when an 8 MHz crystal is used) PLL frequency synthesizer 8-bit serial interface (2 channels: One for two-wire or three-wire mode, compatible with I2C bus, and one for three-wire mode only) D/A converter: 8 bits × 9 lines (PWM output) A/D converter: 6 bits × 8 lines Horizontal synchronizing signal counter Commercial power supply frequency counter Power-failure detection circuit and power-on reset circuit Interrupt input for remote-controller signal (with noise canceler) User-programmable image display controller (IDC) Displayed characters : Up to 192 per screen (more characters can be displayed when the use of the entire screen is specified with a program) Display mode : 16 × 16 dots in 15 lines × 24 columns 14 × 16 dots in 17 lines × 24
