Table 3 shows the menu of instructions that are available for moving data around within the internal memory spaces, and the addressing modes that can be used with each one. With a 12MHz clock, all of these instructions execute in either 1 or 2ms. The MOV [dest], [src]
Data Transfer 80C51
Internal RAM
Table 3 shows the menu of instructions that are available for moving data around within the internal memory spaces, and the addressing modes that can be used with each one. With a 12MHz clock, all of these instructions execute in either 1 or 2ms. The MOV [dest], [src] instruction allows data to be transferred between any two internal RAM or SFR locations without going through the Accumulator.
Table 3 shows the menu of instructions that are available for moving data around within the internal memory spaces, and the addressing modes that can be used with each one. With a 12MHz clock, all of these instructions execute in either 1 or 2ms. The MOV [dest], [src]
Instruction Set of 80C51
Arithmetic Instructions
The menu of arithmetic instructions is listed in Table 1.4.1 The table indicates the addressing modes that can be used with each instruction to access the operand.
For example, the ADD A, instruction can be written as:
The menu of arithmetic instructions is listed in Table 1.4.1 The table indicates the addressing modes that can be used with each instruction to access the
For example, the ADD A,
Addressing modes in the 80C51
The addressing modes in the 80C51 instruction set are as follows:
An "addressing mode" refers to how you are addressing a given memory location. In summary, the addressing modes are as follows, with an example of each:
An "addressing mode" refers to how you are addressing a given memory location. In summary, the addressing modes are as follows, with an example of each:
Special Function Register Microcontroller
A Map of the on-chip memory area called the Special Function Register (SFR) space is shown in Figure 1.2.1. Note that in the SFRs not all of the addresses are occupied. Unoccupied addresses are not implemented on the chip. Read accesses to these addresses will in general return random data, and write accesses will have no effect.
Microcontroller MCS-51 Architecture
Memory Organization
All 80C51 devices have separate address spaces for program and data memory, as shown in Figures 1.1.1 and 1.1.2. The logical separation of program and data memory allows the data memory to be accessed by 8-bit addresses, which can be quickly stored and
All 80C51 devices have separate address spaces for program and data memory, as shown in Figures 1.1.1 and 1.1.2. The logical separation of program and data memory allows the data memory to be accessed by 8-bit addresses, which can be quickly stored and
5-BAND GRAPHIC EQUALISER
By aRie eMDee
This equaliser uses low-cost op-amps. Good-quality opamps powered by a single voltage supply are readily available in the market. The op-amp should have a noise density of less than 24nV/√Hz, slew rate of more than 5V/µs and gainbandwidth product greater than 3MHz. The NE5532 or LM833 used in this circuit meets these requirements. Equaliser circuits typically divide the audio spectrum into separate frequency bands and have independent gain control for each band.
This equaliser uses low-cost op-amps. Good-quality opamps powered by a single voltage supply are readily available in the market. The op-amp should have a noise density of less than 24nV/√Hz, slew rate of more than 5V/µs and gainbandwidth product greater than 3MHz. The NE5532 or LM833 used in this circuit meets these requirements. Equaliser circuits typically divide the audio spectrum into separate frequency bands and have independent gain control for each band.
A Cmos 4060 Burglar Alarm
Circuit: Aryanto
Description:
This is a single zone alarm - with automatic exit, entry and siren cut-off timers. It will accommodate all the usual types of normally-closed input devices - such as magnetic-reed contacts - foil tape - PIRs etc.
Description:
This is a single zone alarm - with automatic exit, entry and siren cut-off timers. It will accommodate all the usual types of normally-closed input devices - such as magnetic-reed contacts - foil tape - PIRs etc.
Direct-to-Home TV: All channels without a cable
DTH services will bring an era of competition for cable TV operators and force them to improve quality. Users will have access to high quality programming on pay channels while persons in far-flung areas where cable operators are yet to reach will be able to use the dish antennas for receiving channels.
Direct to home tv Enjoy more channels with better quality!
The recently approved direct-to-home (DTH) TV obviates the requirement of cable-wallahs and enables viewers to access error-free programmes with better picture- and audio-quality
Security Monitor
Circuit : Aryanto
Email : arie.emdee@yahoo.com
Description:
A remote listening circuit. The area to be monitored is connected via a cable and allows remote audio listening.
Email : arie.emdee@yahoo.com
Description:
A remote listening circuit. The area to be monitored is connected via a cable and allows remote audio listening.
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