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PIC16C55X芯片详情分析

时间:2011-01-13 09:44:45

单片机解密过程中,对芯片内部结构及其加解密特征进行技术分析是解密工程师的一项必修课,因为只有充分理解单片机内部结构原理等技术信息,工程师才能准确进行方案开发,确定最可靠、成功率最高的芯片解密方案,最大限度确保解密项目的安全可靠
High Performance RISC CPU:
·Only 35 instructions to learn
·All single-cycle instructions (200 ns), except for program branches which are two-cycle
·Operating speed:
- DC - 20 MHz clock input
- DC - 200 ns instruction cycle
·Interrupt capability
·16 special function hardware registers
·8-level deep hardware stack
·Direct, Indirect and Relative addressing modes
Peripheral Features:
·13 I/O pins with individual direction control
·High current sink/source for direct LED drive
·Timer0: 8-bit timer/counter with 8-bit programmable prescaler
Special Microcontroller Features:
·Power-on Reset (POR)
·Power-up Timer (PWRT) and Oscillator Start-up Timer (OST)
·Watchdog Timer (WDT) with its own on-chip RC oscillator for reliable operation Special Microcontroller Features (cont'd)
·Programmable code protection
·Power saving SLEEP mode
·Selectable oscillator options
·Serial in-circuit programming (via two pins)
·Four user programmable ID locations CMOS Technology:
·Low-power, high-speed CMOS EPROM technology
·Fully static design
·Wide operating voltage range
- 2.5V to 5.5V PIC16C55X
- 3.0 to 5.5V PIC16C55XA
·Commercial, industrial and extended temperature range
·Low power consumption
- < 2.0 mA @ 5.0V, 4.0 MHz
- 15 ?A typical @ 3.0V, 32 kHz
- < 1.0 ?A typical standby current @ 3.0V

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