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