Description

The HD404318 Series is 4-bit HMCS400-series microcomputer with large-capacity memory designed to increase program productivity. Each microcomputer has an A/D converter and input capture timer built in. They also come with high-voltage I/O pins that can directly drive a fluorescent display.

Features

•  34 I/O pins

 One input-only pin

 33 input/output pins: 21 pins are high-voltage pins (40 V, max.)

•  On-chip A/D converter (8-bit ×8-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

•  Seven interrupt sources

 Two by external sources

 Three by timers

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

•  Two low-power dissipation modes

 Standby mode

 Stop mode

•  Instruction cycle time 1 µs (fosc = 4 MHz)