Overview

The LC651154N/F/L and the LC651152N/F/L are the small-scale control application versions of Sanyo’s LC6500 series of 4-bit single-chip CMOS microcontrollers, and feature the same basic architecture and instruction set.

Features

• Fabricated in a CMOS process for low power (A standby function that can be invoked under program control is also provided.)

• ROM/RAM

LC651154N/F/L — ROM: 4K ×8 bits,

RAM: 256 ×4 bits

LC651152N/F/L — ROM: 2K ×8 bits,

RAM: 256 ×4 bits

• Instruction set: The 80-instruction set common to the LC6500 family

• Wide operating supply voltage range: 2.2 to 6.0 V (L versions)

• Instruction cycle time: 0.92 µs (F versions)

• On-chip serial I/O function

• Flexible I/O ports

— Number of ports: 6 ports with a total of 22 pins

— All ports:

· Are I/O ports

· I/O voltage handling capacity: 15 V (maximum) (Open-drain specification C, D, E, and F ports only)

· Output current: 20 mA (maximum) sink current (Are capable of directly driving an LED.)

— Support options to match application system specifications

A. Open-drain output, internal pull-up resistor specification: All ports, in bit units

B. Output level at reset specification: Ports C and D can be specified to go to the high or low level in 4-bit units.

• Interrupt function

— Timer interrupts through an interrupt vector (Can be tested under program control)

— INT pin and serial I/O full/empty interrupts through an interrupt vector (Can be tested under program control)

• Stack levels: 8 (Shared with the interrupt system.)

• Timers: 4-bit variable prescaler and 8-bit programmable timers

• Clock oscillator options that match a wide range of system specifications

— Oscillator circuit options:

Two-pin RC oscillator (N and L versions)

Two-pin ceramic oscillator (N, F, and L versions)

— Clock divider circuit options: No divider, built-in divide-by-3, built-in divide-by-4 (N and L versions)

• Continuous square wave output (with a period 64 times the cycle time)

• A/D converter (successive approximation)

— 8-bit precision with 8 input channels

• Watchdog timer