●Overview
●The LC651431N/F/L and LC651432N/F/L are the small scale control models in Sanyo’s LC6500 Series of 4-bit
●microcontrollers and feature the same basic architecture and instruction set.
●Features
●• Fabricated in a CMOS process for low power operation(Standby mode can be controlled by CPU instructions.)
●• ROM/RAM
● LC651432N/F/L
●—ROM: 2 K ×8 bits, RAM: 128 ×4 bits
● LC651431N/F/L
●—ROM: 1 K ×8 bits, RAM: 64 ×4 bits
●• Instruction set: The 80-instruction set common to the whole LC6500 Series
●• Wide operating supply voltage range of 2.2 to 6.0 V(L versions)
●• Instruction cycle time of 0.92 µs (F versions)
●• On-chip serial I/O function
●• Highly flexible I/O ports
● Number of ports
●— 7 ports (Up to 25 pins)
●All ports
●— Can be used for either input or output
●— Voltage handling capability (input and output): 15 V maximum (For open-drain specification ports)
●— Output current: 20 mA maximum sink current (Capable of directly driving an LED.) I/O port options to match application requirements:
●— Open-drain output and pull-up resistor specification: Can be specified for all ports in bit units.
●— Output level at reset specification: Either a high or low level can be specified for ports C and D in 4-bit units each.
●• Interrupts
● Timer overflow vector interrupt (can also be tested by CPU instructions)
● INT pin or serial I/O full/empty vector interrupt (can also be tested by CPU instructions)
●• Stack levels: 4 levels (also used by interrupts)
●• Timers: 8-bit programmable timer with 4-bit prescaler
●• Clock oscillator options to match application requirements:
●Oscillator circuit option:
●— Two-pin RC oscillator (N and L versions) Two-pin ceramic oscillator or single external clock input pin (N, F, and L versions)
●— Divider circuit option: No divider, built-in divide by-three circuit, built-in divide-by-four circuit(N and L versions)
●• Continuous square-wave output with a period 64 times the cycle time.
