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