LC651154L

Four-Bit CMOS Microcontrollers for Small-Scale Control Applications

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