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PIC16C505T-20E芯片研究资料

时间:2011-01-10 08:48:41

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 33 instructions to learn
·Operating speed:
- DC - 20 MHz clock input
- DC - 200 ns instruction cycle
·Direct, indirect and relative addressing modes for data and instructions
·12 bit wide instructions
·8 bit wide data path
·2-level deep hardware stack
·Eight special function hardware registers
·Direct, indirect and relative addressing modes for data and instructions
·All single cycle instructions (200 ns) except for program branches which are two-cycle
Peripheral Features:
·11 I/O pins with individual direction control
·1 input pin
·High current sink/source for direct LED drive
·Timer0: 8-bit timer/counter with 8-bit programmable prescaler
Special Microcontroller Features:
·In-Circuit Serial Programming (ICSP?)
·Power-on Reset (POR)
·Device Reset Timer (DRT)
·Watchdog Timer (WDT) with dedicated on-chip RC oscillator for reliable operation
·Programmable Code Protection
·Internal weak pull-ups on I/O pins
·Wake-up from Sleep on pin change
·Power-saving Sleep mode
·Selectable oscillator options:
- INTRC: Precision internal 4 MHz oscillator
- EXTRC: External low-cost RC oscillator
- XT: Standard crystal/resonator
- HS: High speed crystal/resonator
- LP: Power saving, low frequency crystal
CMOS Technology:
·Low-power, high-speed CMOS EPROM technology
·Fully static design
·Wide operating voltage range (2.5V to 5.5V)
·Wide temperature ranges
- Commercial: 0?C to +70?C
- Industrial: -40?C to +85?C
- Extended: -40?C to +125?C
- < 1.0 ?A typical standby current @ 5V
·Low power consumption
- < 2.0 mA @ 5V, 4 MHz
- 15 ?A typical @ 3.0V, 32 kHz for TMR0 running in SLEEP mode
- < 1.0uA typical standby current @ 5V
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