HD4074654S

HD404654 Series 4-Bit Single-Chip Microcomputer Rev. 7.0 Sept. 1999 Description The HD404654 Series is a member of the HMCS400-series of microcomputers designed to increase program productivity with large-capacity memory. Each microcomputer has a high-precision dual-tone multi-frequency (DTMF) generator, three timers, serial interface, voltage comparator, and input capture circuit. The HD404654 Series includes three chips: the HD404652 with 2 k-word ROM; the HD404654 with 4 kword ROM; and the HD4074654 with 4 k-word PROM (ZTAT ™ version). The HD4074654 is a PROM version (ZTAT™ microcomputer). A program can be written to the PROM by a PROM writer, which can dramatically shorten system development periods and smooth the process from debugging to mass production. (The ZTAT™ version is 27256-compatible.) ZTAT ™ : Zero Turn Around Time. ZTAT is a trademark of Hitachi Ltd. Features www.DataSheet4U.com 27 I/O pins and 5 dedicated input pins  10 high-current output pins: Six 15-mA sinks and four 10-mA sources Three timer/counters Eight-bit input capture circuit Two timer outputs (including two PWM outputs) One event counter input (including one double-edge function) One clock-synchronous 8-bit serial interface Voltage comparator (2 channels) On-chip DTMF generator (fOSC = 400 kHz, 800 kHz, 2 MHz, 3.58 MHz or 4 MHz) Built-in oscillators  Main clock: Ceramic or crystal oscillator (an external clock is also possible) Six interrupt sources  Two by external sourc...