EM78P447S芯片解密是EMS單片機(jī)解密研究中芯片解密事業(yè)部成功破解的典型芯片，在EMS系列單片機(jī)解密領(lǐng)域，芯片解密事業(yè)部早期就已經(jīng)攝入且順利破解了大部分典型單片機(jī)型號(hào)，此后，我們還針對(duì)該系列單片機(jī)開展低成本解密研究，目前，該系列芯片解密的周期短、價(jià)格低、解密成功率高、可靠性強(qiáng)，能夠?yàn)榭蛻舻恼w項(xiàng)目開發(fā)提供最值得信賴的技術(shù)支持。
以下我們就首先簡單介紹EM78P447S芯片的主要內(nèi)部特征，供大家進(jìn)行技術(shù)分析和理解。
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). It 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.
EM78P447S FEATURES
Operating voltage range: 2.3V~5.5V.
Operating temperature range: 0°C~70°C.
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.
Low power consumption:
* Less then 2.2 mA at 5V/4MHz
* Typically 30 μA, at 3V/32KHz
* Typically 1 μA, during sleep mode
4K × 13 bits on chip ROM
One security register to prevent intrusion of OTP memory codes
One configuration register to accommodate user’s requirements
148× 8 bits on chip registers(SRAM, general purpose register)
3 bi-directional 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 interruptions
* 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
EM78P447S芯片解密等EMS 單片機(jī)解密需求者歡迎與芯片解密事業(yè)部聯(lián)系，我們將根據(jù)您的具體需要為您提供最安全可靠的解密方案，更多詳情請(qǐng)咨詢www.stc12fjiemi.com