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