The PIC has an overall of 40 pins. These pins include input/output ports such as PORTA, PORTB, PORTC, PORTD, PORTE and two Vdd ports for input voltage. The PIC architecture is characterized by its multiple attributes:Separate code and data spaces Harvard architecture. A small number of fixed length instructions. Most instructions are single cycle execution, with one delay cycle on branches and skips. All RAM locations function as registers as both source and destination of math and other functions. A hardware stack for storing return addresses. Data space mapped CPU, port, and peripheral registers. The program counter is also
mapped into the data space and writable. There is no distinction between memory space and register space because the RAM serves the job of both memory and registers, and it is usually just referred
to as the register file. The keypad:This device is used to enter the password selected by the user and to arm or disarm the alarm by selecting the various profiles installed in the system.
Born in Glasgow in 1819 Pinkerton worked for a sort time as the Cook County Deputy Sherriff before in 1849 being the first detective appointed in the Chicago Police department Dempsey, 2010. Pinkerton also went on to investigate mail thefts as a special U. S. mail agent in 1850 Dempsey, 2010. t was in the early 1850's that in partnership with Edward Rucker he started up his on private detective agency, located in the North West of the country Dempsey, 2010. After only a year his partner left, at which time the firm was renamed the Pinkerton National Detective Agency, with the tag line 'the eye that never sleeps' Dempsey, 2010.
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