产品说明
General Description
EM78P447N is an 8-bit microprocessor with low-power and high-speed CMOS technology and high noise immunity. It has a built-in 4K x 13-bit Electrical One Time Programmable Read Only Memory (OTP-ROM). It provides three protection bits to prevent intrusion of user's OTP memory code. Seven option bits are also available to meet user's requirements.
With its enhanced OTP-ROM features, the EM78P447N provides a convenient way of developing and verifying user's programs. Moreover, this OTP device offers the advantages of easy and effective program updates, using development and programming tools. User can avail of the ELAN Writer to easily program his development code.
Features
Operating voltage: 2.5V ~ 5.5V
Operating temperature: -40°C ~ 85°C
Operating frequency range (base on 2 clocks)
* Crystal mode: DC ~ 20MHz at 5V, DC ~ 8MHz at 3V, DC ~ 4MHz at 2.5V
* RC mode: DC ~ 4MHz at 5V, DC ~ 4MHz at 3V, DC ~ 4MHz at 2.5V
Low power consumption:
* Less than 2.2 mA at 5V/4MHz
* 35 μA Typical at 3V/32KHz
* 2 μA Typical, during sleep mode
4K x 13 bits on-chip ROM
One security register to prevent intrusion of OTP memory codes
One configuration register to accommodate user's requirements
148 x 8 bits on-chip registers (SRAM, general purpose register)
3 bidirectional I/O ports
5-level stacks for subroutine nesting
8-bit real time clock/counter (TCC) with selective signal sources, trigger edges, and overflow interrupt
Two clocks per instruction cycle
Power down (Sleep) mode
Two available interrupts
* TCC overflow interrupt
* External interrupt
Programmable free running watchdog timer
10 programmable pull-high pins
2 programmable open-drain pins
2 programmable R-option pins
Package types:
* 24-pin Skinny DIP 300 mil : EM78P447NCK
* 24-pin SOP 300 mil : EM78P447NCM
* 28-pin DIP 600 mil : EM78P447NAP
* 28-pin DIP 600 mil : EM78P447NEP
* 28-pin Skinny DIP 400 mil : EM78P447NGK
* 28-pin SOP 300 mil : EM78P447NAM
* 28-pin SSOP 209 mil : EM78P447NAS
* 32-pin DIP 600 mil : EM78P447NBP
* 32-pin SOP 450 mil : EM78P447NBWM
* 32-pin SOP 300 mil : EM78P447NBM
* 32-pin Skinny DIP 400 mil : EM78P447NBK
Single instruction cycle commands
Transient point of system frequency between HXT and LXT is 400KHz
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