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.

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