HD4074344单片机解密

HD4074344解密等HITACHI(日立)系列单片机解密是世纪芯科技的优势解密项目之一，在日立的各个系列IC芯片及单片机解密领域，我们已经成功服务了一大批电子企业及电子工程师，为客户的学习研究与参考设计提供了全方位技术参考。

这里我们仅提供对HD4074344单片机的基本性能特征介绍，因为在单片机解密技术研究中，对需解密单片机的内部结构特性有一定了解能够更好的理解其加解密特性，有HD4074344解密需求者请直接与我们联系咨询详情：

　　关于HD4074344：

The HD404344R series and HD404394 series 4-bit microcomputers are products of the HMCS400 series,which is designed to make application systems compact while realizing higher performance and increasing program productivity.

　　Each microcomputer has an A/D converter, two timers and a serial interface. The HD404344R series includes the HD404344R with on-chip 4-kword ROM, HD404342R with 2-kword ROM, and HD404341R with 1-kword ROM. The HD404394 series includes the HD404394 with on-chip 4-kword ROM,HD404392 with 2-kword ROM, and HD404391 with 1-kword ROM.The HD4074344 and HD4074394 are the PROM version ZTAT? microcomputers. Programs can be written to the PROM by a PROM writer, which can dramatically shorten system development periods and smooth the process from debugging to mass production. (The PROM program specifications are the same as for the 27256.)

  HD4074344 Features：

　　· Input/output pins

　　HD404344R series, HD4074344: 22 pins (10pins: Large-current I/O pins)

　　HD404394 series: 21 pins (3 pins: intermediate-voltage NMOS open drain I/O; 5 pins: NMOS open drain I/O with 15-mA

　　high-current driver)

　　· Two timer/counters

　　One timer output

　　One event counter input (with programmable edge detection)

　　· 8-bit clock-synchronous serial interface (1 channel)

　　· On-chip A/D converter

　　HD404344R series, HD4074344: 8 bit ? 4 channel

　　HD404394 series: 8 bit ? 3 channel (with Vref pin)

　　· Built-in oscillator

　　HD404344R Series Ceramic oscillator, CR oscillation, External clock drive is also possible.

　　HD404394 Series, HD4074344 Ceramic oscillator, External clock drive is also possible.

　　· Five interrupt sources

　　One by external source (with programmable edge detection)

　　Four by internal sources

　　· Subroutine stack

　　Maximum 16 levels including interrupts

　　· Two low-power dissipation modes

　　Standby mode

　　Stop mode

　　· One input signal to return from stop mode

　　· Instruction cycle time

　　1 ms (fOSC = 4 MHz)