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EM78P451 IC解密

来源:芯片解密-龙芯世纪   时间:2010-07-01   阅读:1173

EM78P451 芯片解密是龙芯世纪在 研究中成功破解的典型芯片型号,针对该芯片,我们解密周 期短、价格低、可靠性强。这里,我们将针对EM78P451芯片的主要技术特征做简单介绍,这里我们仅提供对EM78P451芯片的主要 功能特征介绍,供客户及各类芯片解密工程师与电子工程师参考借鉴,有芯片解密,ic解密 需求者请直接与我们联系咨询。
 
下面是关于EM78P451芯片的主要性能特征介绍,我们提供给广大客户及其他各类技术工程师参考借鉴。
The EM78P451 is an 8-bit microprocessor designed and developed with low-power, high speed CMOS technology. Its operational kernel is implemented with RISC-like architecture and is available in the mask ROM version. The one time programmable (OTP) version is flexible, both in mass production or engineering test stages. OTP provide users with unlimited volume with favorable price opportunities. This device is equipped with the Serial Peripheral Interface (SPI) function and an easy-implemented RS-232. The EM78P451 is very suitable for wired communication. Only 58 easy-to-learn instructions are needed and user’s program can be emulated with EMC In-Circuit Emulator (ICE).
EM78P451  FEATURES
Operating voltage range: 2.3V~5.5V.
Operating temperature range: 0°C~70°C.
Operating frequency rang (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 3 mA at 5V/4MHz
* Typically 10 mA during sleep mode
Serial Peripheral Interface (SPI) available.
4K ? 13 bits on chip ROM (EM78P451).
11 special function registers.
140? 8 bits on chip general-purposed registers.
5 bi-directional I/O ports (35 I/O pins).
3 LED direct sinking pins with internal serial resistors.
Built-in RC oscillator with external serial resistor, ±10% variation.
Built-in power-on reset.
5 stacks for subroutine nesting.
8-bit real time clock/counter (TCC) with overflow interrupt.
Two machine clocks or four machine clocks per instruction cycle.
Power down mode.
Programmable wake up from sleep circuit on I/O ports.
Programmable free running on-chip watchdog timer.
12 wake-up pins.
2 open-drain pins.
2 R-option pins.
32 programmable pull-high input pins.
 
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