Atmel 89s51 pdf

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All Application Notes. Please contact sales office if device weight is not available. All rights reserved. We detect you are using an unsupported browser. For the best experience, please visit the site using Chrome, Firefox, Safari, or Edge. This page requires frames in order to show content. Browse Services Foundry Services. Tools and Resources. These registers can also be read like any other register. Interface SD Card with Arduino. All of the above registers are 8-bits, except DPTR and the program counter.

It can be programmed to operate at different baud rates. Port P 0 and P 2 are also used to provide low byte and high byte addresses, respectively, when connected to an external memory.

Timer 0 Register; The bit register of time 0 is accesses as low byte and high byte. Newer Post Older Post Home. One side of each capacitor is connected to the ground as shown in this figure.

With an 8-bit data type, any data larger than 8 bits must be broken into 8-bit chunks before it is processed. Port 3; is a dual — purpose port on pins Set by hardware halfway through the stop bit time in mode1.

View my complete profile. Quartz crystal oscillator up to 24 MHz. See the following table for its specs Microcontgoller block diagram shows the internal structure of the microcontroller AT89C51; Pin description of this MCU can be seen in the following diagram; Port 0 ; is a dual-purpose port on pins of the 1C.

This makes mode 2 and auto-reload, in contrast with mode 1 in at89c the programmer has to reload TH and TL. GND; Pin 20 is the Ground pin. Read from external data memory. ALE; address latch enable is an output pin a nd is active high. Since the 89C51 has an 8-bit architecture, each bit timer is accessed as two separate registers of low byte and high byte.

Set by hardware at the beginning of the stop bit in mode1. Posted by Fani at 4: When 1s are written to these port pins, they are pulled high by the internal pull-ups and can be used as inputs. It can be programmed to operate at different baud rates. Interface GPS with Arduino. Program pulse input during Flash programming.

All these ports are 8-bit bi-directional ports, i. Output transmitter for serial communication. In addition, the AT89C51 is designed with static logic for operation down to zero frequency and supports two software selectable power saving modes. When 1s are written to these port pins, they are pulled high by the internal pull-ups and can be used as inputs. Interface SD Card with Arduino. The AT89C51 provides the following standard features: These ports are also bit addressable and so their bits can also be accessed individually.

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