Description

The HD404449 Series is a HMCS400-series microcomputer designed to increase program productivity with large-capacity memory. Each microcomputer has four timers, two serial interfaces, A/D converter, input capture circuit, 32-kHz oscillator for clock, and four low-power dissipation modes.

Features

•  8,192-word ×10-bit ROM (HD404448)

   16,384-word ×10-bit ROM (HD404449 and HD4074449)

•  1,152-digit ×4-bit RAM

•  64 I/O pins, including 10 high-current pins (15 mA, max)

•  Four timer/counters

•  Eight-bit input capture circuit

•  Three timer outputs (including two PWM outputs)

•  Two event counter inputs (including one double-edge function)

•  Two clock-synchronous 8-bit serial interfaces

•  A/D converter (4-channel ×8-bit)

•  Built-in oscillators

 Main clock: 4-MHz ceramic oscillator or crystal (an external clock is also possible)

 Subclock: 32.768-kHz crystal

•  Subroutine stack up to 16 levels, including interrupts

•  Four low-power dissipation modes

 Subactive mode

 Standby mode

 Watch mode

 Stop mode

•  One external input for transition from stop mode to active mode

•  Instruction cycle time: 1 µs (fOSC= 4 MHz)

•  Two operating modes

 MCU mode (HD404448, HD404449)

 MCU/PROM mode (HD4074449)

•  Eleven interrupt sources

 Four by external sources, including two double-edge function

 Seven by internal sources