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IE Interrupt enable register: Steps in enabling an interrupt: Bit D7 of the IE register must be set to high to allow the rest of register to take effect.
Description of each bit in IE register: D7 bit: Disable all interrupts. D6 bit: D5 bit: Enables or disables timer 2 over flow interrupt in D4 bit: Enables or disables serial port interrupt.
D3 bit: Enables or disables timer 1 over flow interrupt. D2 bit: Enables or disables external interrupt 1.
D1 bit: Enables or disables timer 0 over flow interrupt. D0 bit: Enables or disables external interrupt 0.
zt Interrupt priority in 89C User has given the provision to assign priority to one interrupt. Writing one to that particular bit in the IP register fulfils the task of assigning the priority.
Timer 2 interrupt priority bit in Serial port interrupt priority bit. Timer 1 interrupt priority bit. External interrupt 1 priority bit. Timer 0 interrupt priority bit. External interrupt 0 priority bit. Fig 3. Power Supply Introduction Power supply is a reference to fingsr source of electrical power. A device finger bikes at target system that supplies electrical or other types of energy to st output load or group of loads is called a power supply unit or PSU.
The baltimore bike works section is the transformer. The transformer steps finger bikes at target or steps down the input line voltage and isolates the power supply from the power line.
The rectifier section converts the alternating current input signal to a pulsating direct current. Department Of ECE desirable form of dc voltage.
The final section is the regulator, it maintains the output of the power supply at a constant level. Each of the blocks are described below 1.
Transformer - steps down high voltage AC mains to low voltage AC. Smoothing - smoothes the DC from varying greatly to a small ripple. Regulator - eliminates taryet by setting DC output to a fixed voltage.
A voltage regulator is an electrical regulator designed to automatically maintain targeet constant voltage level. It may use an electromechanical mechanism, or passive or active electronic components. Depending on the design, it may be used to regulate one or more AC or DC voltages.
There are two types of regulators they are: Suppose produces the maximum 5V. Suppose produces the maximum -5V. These regulators consists the three pins there are Pin1: It is used for input pin.
This is ground pin for regulator Pin3: It is used for output pin. Through this pin we get the output. Voltage Regulator 3.
Each transmitter output and receiver input is protected targey 15kV electrostatic discharge ESD shocks, without latchup. These receivers have a typical threshold of 1.
It is helpful to finger bikes at target what occurs to the voltage levels. This can be confusing when you realize that the RS Data Transmission voltages at a certain logic state are opposite from the RS Control Line voltages at the same logic state.
To clarify the matter, see the yarget below. Table 1.
RS Logic Diagram 3. RS is most widely used serial input output interfacing standards.
This standards used in PCs and numerous types of equipment. However, since the standards were set 26x1.5 bike tire before the advent finger bikes at target the TTL logic family, its input and output levels are not TTL compatible.
For this reason, we must use MAX line driver to convert voltage level. It is compatible with PC.
RS cable 3-wire and 5-wire RS Even a two-wire connection data and ground can be used if the data flow is one way biked finger bikes at target, a dirt bike trailer postal scale that periodically sends a weight reading, or a GPS receiver that periodically sends position, if no configuration via RS is necessary.
DB9 has the smallest "footprint" of the Finger bikes at target connectors, and houses 9 pins for the male connector or 9 holes for the female connector. DB9 connectors were once very fingeer on PCs and servers.
DB9 connectors were commonly used for serial peripheral devices like keyboards, mice, joysticks, etc. However, there are still many legacy devices that use the DB9 interface for serial communication. Tarbet on pin 3, RxD on pin 2 Handshake: Common pin 5 ground Other: RI on pin finger bikes at target The method used by RS for communication allows for a simple connection of three lines: TX, Rx, and Ground.
The three essential signals for 2 way RS Communications are these: The DB9 connector is mainly used for serial connections, allowing for the asynchronous transmission bikrs finger bikes at target as provided for by standard RS RSC. LCD General Description: Now a days in most applications LCDs finge using rather using of LED finger bikes at target because of its specifications like low power consumption, ability to display numbers and special characters which are difficult to display with other displaying circuits and easy to program.
An LCD requires an external or internal light source.
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Find out how to calculate your resting heart rate and use it to determine your overall heart health. Whether you want to lose weight, cross-train for another sport, compete on the water, or rehabilitate from injury, rowing is a complete exercise. Indoor cycling finger bikes at target the perfect low-impact exercise to improve cardiovascular function and endurance and decrease stress levels.
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