DESCRIPTION

The SM565 is a CMOS 4-bit single-chip microcomputer incorporating carrier output circuit for remote control, ROM, RAM, I/O ports, serial interface and timer/ counter. It provides five kinds of interrupts and subroutine stack function using the RAM area. Provided with a 256 segments LCD drive circuit, this microcomputer is applicable to a multi-functional AV remote control system, high performance hand-held LCD games or any other similar system with low power consumption.

FEATURES

• 8,192 × 8-bits ROM Capacity

• 256 × 4-bits RAM Capacity (Including 64 × 4-bits Display RAM)

• 98 Instruction Sets

• A RAM Area is Used as Stack Area

• I/O Ports

– 4 Input

– 11 Input/Output (plus 16 Also Used as LCD Segment Port)

• Interrupts

– Internal Interrupt × 4 (Timer/Counter, f4 Signal, Serial I/O, Divider Overflow)

– External Interrupt × 1 (P0 Signal)

• Timer/Counter 8-bits × 1

• Serial Interface 8-bits × 1

• Built-in Main Clock Oscillator for System Clock

• Built-in Sub Clock Oscillator for Real Time Clock

• Built-in 15 Stages Divider for Real Time Clock

• Built-in LCD Driver

– 256 Segments

– 1/3 Bias

– 1/4 Duty Cycle (If LCD Drive circuit is used, a crystal oscillator circuit needs to be constituted between OSCIN and OSCOUT)

• Built-in Carrier Output Circuit for Remote Control

– Carrier Frequency 37.9 kHz

– Basic Oscillation Frequency (Main Clock) 455 kHz

– 1/3 or 1/2 (Mask Option) Duty Cycle

– Reversal Polarity (Mask Option)

• Instruction Cycle Time 8.79 µs (TYP., 455 kHz at 3 V)

• Buzzer Output

• Standby Function

• Supply Voltage 2.4 V to 5.5 V

• 100-pin QFP (QFP100-P-1420) Package