EM78P447S芯片解密是EMS單片機解密研究中芯片解密事業部成功破解的典型芯片，在EMS系列單片機解密領域，芯片解密事業部早期就已經攝入且順利破解了大部分典型單片機型號，此后，我們還針對該系列單片機開展低成本解密研究，目前，該系列芯片解密的周期短、價格低、解密成功率高、可靠性強，能夠為客戶的整體項目開發提供最值得信賴的技術支持。
以下我們就首先簡單介紹EM78P447S芯片的主要內部特征，供大家進行技術分析和理解。
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 單片機解密需求者歡迎與芯片解密事業部聯系，我們將根據您的具體需要為您提供最安全可靠的解密方案，更多詳情請咨詢www.stc12fjiemi.com