HD404318

Features:

·  34 I/O pins One input-only pin 33 input/output pins: 21 pins are high-voltage pins (40 V, max.)
·  On-chip A/D converter (8-bit ´ 8-channel)
·  Three timers One event counter input One timer output One input capture timer
·  8-bit clock-synchronous serial interface (1 channel)
·  Alarm output
·  Built-in oscillators Ceramic or crystal oscillator External clock drive is also possible
·  Seven interrupt sources Two by external sources Three by timers One each by the A/D converter and serial interface
·  Two low-power dissipation modes Standby mode Stop mode
·  Instruction cycle time 1 ms (fosc = 4 MHz)


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	2
		VCC 45 to VCC + 0.3	V	3
Total permissible input current	Io	70	mA	4
Total permissible output current	-Io	150	mA	5
Maximum input current	Io	4	mA	6, 7
		20	mA	6, 8
Maximum output current	Io	4	mA	9, 10
		30	mA	10, 11
Operating temperature	Topr	20 to +75	°C
Storage temperature	Tstg	55 to +125	°C

Description

The HD404318 Series is 4-bit HMCS400-series microcomputer with large-capacity memory designed to increase program productivity. Each microcomputer has an A/D converter and input capture timer built in.

HD404318 also come with high-voltage I/O pins that can directly drive a fluorescent display.

The HD404318 Series includes four chips: the HD404318 with 8-kword ROM; the HD404316 with 6-kword ROM; the HD404314 with 4-kword ROM; the HD4074318 with 8-kword PROM.

TheHD404318 is a PROM version ZTA^TM microcomputer. Programs 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 PROM program specifications are the same as for the 27256.)ZTA^TM: Zero Turn Around Time ZTAT is a trademark of Hitachi Ltd.