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)