1、 河 北 农 业 大 学 毕业设计 (论文 )外文资料翻译 院（系） ： 电子信息科学与技术学院 专 业： 电子信息科学与技术 姓 名： 王坤赞 学 号： 2009234020325 外文出处： 附 件： 1.外文资料翻译译文 2.外文原文 完成日期： 2013 年 3 月 20 日 (用外文写 ) STC12C5A The STC12C5A is a low-power, high-performance CMOS 8-bit microcontroller with 8K bytes of in-system programmable Flash memory. The device i
2、s manufactured using Atmels high-density nonvolatile memory technology and is compatible with the indus-try-standard 80C51 instruction set and pinout. The on-chip Flash allows the program memory to be reprogrammed in-system or by a conventional nonvolatile memory pro-grammer. By combining a versatil
3、e 8-bit CPU with in-system programmable Flash on a monolithic chip, the Atmel STC12C5A is a powerful microcontroller which provides a highly-flexible and cost-effective solution to many embedded control applications. The STC12C5A provides the following standard features: 8K bytes of Flash, 256 bytes
4、 of RAM, 32 I/O lines, Watchdog timer, two data pointers, three 16-bit timer/counters, a six-vector two-level interrupt architecture, a full duplex serial port, on-chip oscillator, and clock circuitry. In addition, the STC12C5A is designed with static logic for operation down to zero frequency and s
5、upports two software selectable power saving modes. The Idle Mode stops the CPU while allowing the RAM, timer/counters, serial port, and interrupt system to continue functioning. The Power-down mode saves the RAM con-tents but freezes the oscillator, disabling all other chip functions until the next
6、 interrupt or hardware reset. VCC ： Supply voltage. GND ： Ground. Port 0： Port 0 is an 8-bit open drain bidirectional I/O port. As an output port, each pin can sink eight TTL inputs. When 1s are written to port 0 pins, the pins can be used as high-impedance inputs. Port 0 can also be configured to b
7、e the multiplexed low-order address/data bus during accesses to external program and data memory. In this mode, P0 has internal pull-ups. Port 0 also receives the code bytes during Flash programming and outputs the code bytes dur-ing program verification. External pull-ups are required during progra
8、m verification. Port 1： Port 1 is an 8-bit bidirectional I/O port with internal pull-ups. The Port 1 output buffers can sink/source four TTL inputs. When 1s are written to Port 1 pins, they are pulled high by the inter-nal pull-ups and can be used as inputs. As inputs, Port 1 pins that are externally being pulled low will source current (IIL) because of the internal
