HD404459 Datasheet | Hitachi Semiconductor

Description The HD404459 Series is a member of the 4-bit HMCS400-series microputers with large-capacity memory and architecture providing high program productivity. Each microputer has a 32-k Hz oscillator for clock, low-voltage (1.8 V) operating mode, and four low-power dissipation modes. The HD404459 Series includes three chips: the HD404458 with an 8-kword ROM; the HD404459 with a 16-kword ROM; and the HD4074459 with a 16-kword PROM (ZTATTM version). The HD4074459 is a PROM version (ZTATTM microputer). A program can be written to the PROM by a PROM writer, thus dramatically shortening system development periods and turnaround time (ZTAT TM versions are 27256-patible). ZTAT TM: Zero Turn Around Time ZTAT is a trademark of Hitachi, Ltd. Features - 8,192-word × 10-bit ROM (HD404458) 16,384-word × 10-bit ROM (HD404459 and HD4074459) - 512-digit × 4-bit RAM (HD404458) 768-digit × 4-bit RAM (HD404459 and HD4074459) - 56 I/O pins, including seven input pins - Four timer/counters - 1-channel × 8-bit input capture circuit - Three timer outputs (including two PWM outputs) - Two event counter inputs (including one double-edge function) - 8-bit clock-synchronous serial interface - Eight wakeup inputs - Four-channel voltage parator (external or internal reference power supply can be selected) - Built-in oscillators  Main clock: 4-MHz ceramic or crystal oscillator (an external clock is also possible)  Subclock: 32.768-k Hz crystal w w .D w t a S a e h t e U 4 .c m o Rev. 6.0 Sept. 1998 w w w .D a at S e he t 4U . m o c HD404459 Series - Ten interrupt sources  Five by external sources, including two double-edge function  Five by internal sources - Subroutine stack up to 16 levels, including interrupts - Four low-power dissipation modes (transition time shortened)  Stop mode  Standby mode  Watch mode  Subactive mode (optional) - One external input for transition from stop mode to active mode - Instruction cycle time  For HD404458/HD404459: 1, 2,...