描述 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.

特性 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