TIME OPERATED ELECTRICAL APPLIANCES CONTROL CONTENTS 1. Abbreviations 2. Introduction 3. Block Diagram 4. Block Diagram Description 5. Schematic 6. Schematic Description 7. Hardware Components ? Microcontroller ? Power supply ? Relays ? Lcd ? RTC ? devices 8. Circuit Description 9. Software 10. Conclusion (or) Synopsis 11. Future Aspects. 12. Bibliography ABBREVIATIONS SYMBOL NAME ACC Accumulator B B register PSW Program status word SP Stack pointer DPTR Data pointer 2 bytes DPL Low byte DPH High byte P0 Port0 P1 Port1 P2 Port2 P3 Port3 IP Interrupt priority control IE Interrupt enable control TMOD Timer/counter mode control TCON Timer/counter control T2CON Timer/counter 2 control T2MOD …show more content…
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 internal 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 pull-ups. Port 1 also receives the low-order address bytes during Flash programming and verification. Port 2: Port 2 is an 8-bit bidirectional I/O port with internal pull-ups. The Port 2 output buffers can sink/source four TTL inputs. When 1s are written to Port 2 pins, they are pulled high by the internal pull-ups and can be used as inputs. As inputs, Port 2 pins that are externally being pulled low will source current (IIL) because of the internal pull-ups. Port 2 also receives the high-order address bits and some control signals during Flash programming and verification. Port 3: Port 3 is an 8-bit bidirectional I/O port with internal pull-ups. The Port 3 output buffers can sink/source four TTL inputs. When 1s are written to Port 3 pins, they are pulled high by the internal pull-ups and can be used as inputs. As inputs, Port 3 pins that are externally being pulled low will source current (IIL) because of the pull-ups. Port 3 receives some control signals for Flash programming and verification. Port 3 also serves the functions of various special features of the AT89S51, as shown in the following …show more content…
Ripples can be removed by one of the following methods of filtering. (a) A capacitor, in parallel to the load, provides an easier by ?pass for the ripples voltage though it due to low impedance. At ripple frequency and leave the d.c.to appears the load. (b) An inductor, in series with the load, prevents the passage of the ripple current (due to high impedance at ripple frequency) while allowing the d.c (due to low resistance to d.c) (c) Various combinations of capacitor and inductor, such as L-section filter section filter, multiple section filter etc. which make use of both the properties mentioned in (a) and (b) above. Two cases of capacitor filter, one applied on half wave rectifier and another with full wave
The host writes a byte of data into the data-out register, and sets the write bit in the command register
The uops that are to be computed are dispatched to ports 0, 1, 5 and 6 and are executed in the respective execution units. The execution units in Haswell are arranged in three stacks: SIMD integer, integer and FP which operate independent from each other. Each stack has different data types, potentially different registers and result forwarding networks. The data path can connect with a given stack for accessing the registers and forwarding network. Forwarding between networks may need an extra cycle to move different stacks. The load and store units access the port numbers 2-4 and 7 accesses the integer by pass network thus reducing the access to the GPR and latency for forwarding.
We can classify input/output ports into four categories based on the CPU's ability to read and write data at a given port address. These four categories are read-only ports, write-only ports, read/write ports, and dual I/O ports.
Chapter 8 of the Windows Internals textbook written by Mark Russinovich, David Solomon and Alex Ionescu covers the Windows I/O system. This chapter goes over device drivers, I/O system components and features, and Plug and Play. One of the topics I am covering for my final is the similarities and differences between the Windows and FreeBSD I/O system so this chapter will assist me in explaining how the I/O system in Windows operates and unique factors that Windows has when it comes to I/O.
Ports of a module declaration begin with i for input and o for output followed by Capital.
Here 2 ports PORT B and PORT C of PIC 16F877A is taken. PORT B is used for providing control signals and PORT C is used for providing Data signals.
The pins for Output(Y), Vdd and Vss are created using the metal1 layer while the Input (A) is created on poly layer.
In this report I will be outlining the features and functions of any interconnection devices that you might think of using. In the report I will include Network Interface Card, Router, Switch, Hubs, Gateway, Bridge and Wireless access points.
This is a bit that scan data from and writes knowledge to tiny low disk. The foremost common sort of floppy drive is three.
(AI) channels, two analog output (AO) channels, 12 DIO channels with a full-speed USB interface. Here, it has two parts, one comprises analog input pins (1 to 16) and alternate side has the digital input pins (17 to 32). AIx pins are the input channels where input analog quantities are to be given whereas AO pins are the output channels where the output is to be obtained.
The processor was a separate component with just a memory bus interface, and all peripherals were attached to this bus. As integration levels increase, more and more logic is added to the processor die, creating families of application-specific service processors. The term system on chip (SOC) is often used to describe these highly integrated processors. These SOCs include much of the logic and interfaces that are required for a range of specific target applications. The silicon vendors that develop these SOC devices often create families of SOCs all using the same processor core, but with a wide range of integrated capabilities or integrated devices such as general purpose input/output pins, network interfaces such as Ethernet, USB, PCIe, serial ports, I2C (Inter-Integrated Circuit), expansion parallel buses, DSP and integrated display controllers. Many of these devices interface to nonvolatile storage such as NOR Flash via Serial Peripheral Interconnect (SPI), and native bus interface types. As a general rule, these integrated items are predominantly digital logic elements. Because we need to add analog capabilities, features such as flash memory and digital/analog converters are common, but these capabilities require special features of the silicon manufacturing process.
ADR – (Air Data Input) Input: AOA, TAT, and Pitot & static ports. Output: Airspeed, Mach no., Barometric altitude, TAT, Static Air Temp. And Sensors.
Inputs allow the controller to read temperatures, humidity, pressure, air flow, and other essential factors. The outputs allow the controller to send command and control signals to slave devices, and to other parts of the system. Inputs and outputs are digital or analog.
The half wave rectifier rectifies only half cycle of the AC input waveform. The half wave rectifier consists of a step down transformer, a diode connected to the transformer and a load resistance connected to the cathode side of the diode.