EM78P447S

Product Summary

The EM78P447S is an 8-bit microprocessor with low-power and high-speed CMOS technology. It is equipped with 4K×13-bits Electrical One Time Programmable Read Only Memory (OTP-ROM). The EM78P447S provides a PROTECTION bit to prevent user’s code in the OTP memory from being intruded. Seven OPTION bits are also available to meet user’s requirements. With its OTP-ROM feature, the EM78P447S is able to offer a convenient way of developing and verifying user’s programs. Moreover, user can take advantage of ELAN Writer to easily program his development code.

Parametrics

EM78P447S absolute maximum ratings: (1)Temperature under bias: 0 to 70℃; (2)Storage temperature: -65 to 150℃; (3)Input voltage: -0.3V to +6.0V; (4)Output voltage: -0.3V to +6.0V; (5)Operating Frequency (2clk): DC to 20MHz.

Features

EM78P447S features: (1)Operating voltage range: 2.3V~5.5V; (2)Operating temperature range: 0~70℃; (3)Operating frequency range( base on 2 clocks): Crystal mode: DC~20MHz at 5V, DC~8MHz at 3V, DC~4MHz at 2.3V; RC mode: DC~4MHz at 5V, DC~4MHz at 3V, DC~4MHz at 2.3V; (4)Low power consumption: Less then 2.2 mA at 5V/4MHz; Typically 30 μA, at 3V/32KHz; Typically 1 μA, during sleep mode; (5)4K × 13 bits on chip ROM; (6)One security register to prevent intrusion of OTP memory codes; (7)One configuration register to accommodate user’s requirements; (8)148× 8 bits on chip registers(SRAM, general purpose register); (9)3 bi-directional I/O ports; (10)5 level stacks for subroutine nesting; (11)8-bit real time clock/counter (TCC) with selective signal sources, trigger edges, and overflow interrupt; (12)Two clocks per instruction cycle; (13)Power down (SLEEP) mode; (14)Two available interruptions: TCC overflow interrupt; External interrupt; (15)Programmable free running watchdog timer; (16)10 programmable pull-high pins; (17)2 programmable open-drain pins; (18)2 programmable R-option pins; (19)99.9% single instruction cycle commands; (20)The transient point of system frequency between HXT and LXT is around 400KHz.

Diagrams