HD404654

Features:

·  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 sources Four by internal sources
·  Subroutine stack up to 16 levels, including interrupts
·  Two low-power dissipation modes Standby mode Stop mode
·  One external input for transition from stop mode to active mode
·  Instruction cycle time: 1 ms (fOSC = 4 MHz at 1/4 division ratio) 1/4 or 1/32 division ratio can be selected by hardware
·  Two operating modes MCU mode MCU/PROM mode (HD4074654)

Pinout




Specifications

Item	Symbol	Ratings	Unit	Notes
Supply voltage	VCC	0.3 to +7.0	V
Programming voltage	VPP	0.3 to +14.0	V	1
Pin voltage	VT	0.3 to VCC + 0.3	V
Total permissible input current	Io	80	mA	2
Total permissible output current	-Io	50	mA	3
Maximum input current	Io	4	mA	4,5
		30	mA	4,6
Maximum output current	Io	4	mA	7,8
		20	mA	7,9
Operating temperature	Topr	20 to +75	°C
Storage temperature	Tstg	55 to +125	°C

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 (ZTATä version).

TheHD404654 is a PROM version (ZTATä 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 ZTATä version is 27256-compatible.)ZTA^TM: Zero Turn Around Time. ZTAT is a trademark of Hitachi Ltd.