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

• 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