描述 Description

The HD404339 Series is 4-bit HMCS400-Series microcomputer with large-capacity memory designed to increase program productivity. Each microcomputer has an A/D converter, input capture timer, and a 32-kHz oscillator circuit for clock use all built in. They also come with high-voltage I/O pins that can directly drive a fluorescent display.

特性 Features

? 54 I/O pins

? One input-only pin

? 53 input/output pins: 30 pins are high-voltage pins (40 V, max.)

? On-chip A/D converter (8-bit ×12-channel)

? Three timers

? One event counter input

? One timer output

? One input capture timer

? 8-bit clock-synchronous serial interface (1 channel)

? Alarm output

? Built-in oscillators

? Ceramic or crystal oscillator

? External clock drive is also possible

? Subclock: 32.768-kHz crystal oscillator

? Seven interrupt sources

? Two by external sources

? Three by timers

? One each by the A/D converter and serial interface

? Four low-power dissipation modes

? Standby mode

? Stop mode

? Watch mode

? Subactive mode

? Instruction cycle time: 1 μs (fOSC= 4 MHz, 1/4 division ratio)

? 1/4, 1/8, 1/16, 1/32 system clock division ratio can be selected