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19 Threads found on 8051 Idle
hello friends, I've been working with 8051 for the last 5 years, and this little uC never let me down. But now I've to develop a portable equipment and #A%T$M@E^L 8051 sinks lots of mA... is there any family or uC as easy to find and as cheap as 8051 that would have the same architeture but with much less current consumption?? And also (...)
i need everything about 8051's power down mode and idle mode in detail.
dear all how can we calculate the life of the battery connected to the 8051 system if we connect an 89c51 which consumes 20 mA at 12 mhz clk,to a 3v 1000mAh battery,how many days will the system work? we know we can increase the battery life using the idle mode.can anyone provide how to do the same?. is there any other ways to increase the ba
Hi, Based on the advice in my earlier post to create a battery powered AT89S52 based device, I have added some code for idle mode into my digital clock. Unfortunately, after the micro goes to idle and it receives an interrupt from the RTC, it does not 'wake up'. So I created a test program which handles the INT1 interrupt and displays a sing
Hi, I have an RTC chip (DS12887) that periodically asserts the IRQ line which is connected to the INT0 line of my AT89S52. I have seen that if my micro is in idle mode, the ISR for INT0 gets called periodically, without any intervention. However, if my micro is in power down mode, the ISR does not get called. In power down mode the only wa
FEATURES:  80C51 Central Processing Unit  5 V Operating voltage from 0 MHz to 40 MHz  16 kB of on-chip Flash user code memory with ISP (In-System Programming) and IAP (In-Application Programming)  SPI (Serial Peripheral Interface) and enhanced UART  PCA (Programmable Counter Array) with PWM and Cap
hello! I want my 8051 to go to idle mode but i don't know what are the advantages over power down mode, Can you please show me the advantage ( and actual meaning of it! though i went through the datasheet i still cannot get the whole figure) and how to implement it? I am using KEIL C
hello all, i have implemented the given circuit , in hardware and software, the 8051 code is simple i give a pulse of 0.5s at pin 2.0. Neither the hardware nor the software is working :???: :sad:, i have attached the Proteus design. please tell me why buzzer does not give a beep whereas the LED does, is the current low or what. and recommend a
I have interfaced EEPROM (24C02A) with AT89C2051 ... but data is not written to EEPROM ,can u anyone tell me where is the problem. take a look on attached code #define SDA P3_4 #define SCL P3_5 void I2C_Delay() { unsigned char i; for(i=0;i
-> I want to interface serial communication between 89s52 and hyper terminal.. -> I have made circuit like this... 84929 -> I am making P3_2 pin high before sending frame and after sent making it low. -> Is this right procedure? if not then tell me the right procedure for communication to computer. -> Please help me t
Hello Everyone I am trying to interface a 4 by 4 matrix keyboard to a 8051 microcontroller. I am trying to interface it with using INTERRUPT. So i sincerely request you to give the schematic of 4 by 4 matrix keyboard. I would be connecting only 4 lines to the keyboard. one of them wold be to the interrupt.
I am also looking for a project simply based on ATMEL 8051 + PS2 keyboard which when any button pressed accessed by atmel and show on LCD or 7 Segments. regards
thanks bout we designed a system befor with 8051 which this micro controll some part of system but when our high voltage start to work the micro was halted. we change our design to FPGA and it worked better. now we want to add one feature to it but I dont know we can use AVR or DSP that work well there or no? (there is very powerful electromagnetic
dear friends what will happen if we do not connect the capacitor from reset pin to +Vcc? is there any documents related to power down mode of 8051 is available? i would like to know more about the cold boot and warm boot and other aspects about the power down mode thanking you ml
i am interfacing four 8051 micro controllers using rs 485 protocol, with one as a master while other as slave.I am using max-485 for serial communication.I want to send data to a particular slave,remining other idle.Can any one tell me how to select a particular controller in program
As you mentioned Low Power consumption ( LPC) this term is used for the reason that the entire controller is not driven by a single a single 5V supply... unlike older 8051.. Philips with ARM processor released the controllers called as LPCseries of controllers. it means that CPU or core operates at 1.8V, peripherals at 3.3V and GPIO tolerable a
Hello everyone... I am receiving the data from hyper terminal and trying to save it in array but while doing so m facing problem that it gets write every time to the first location of array . ISR routine is as given below ..(its for 8051) static int i;//declared as global variable void Serial_
just search for microcontrollers which have idle and power down mode... e.g. 8051
i work on PIC and 8051 at this time i have LCD code of PIC 18f452 of 16x2 LCD may be it is not help full for you Code: #include<18F452.h> #use delay(clock = 4000000) //#use I2C(MASTER, SDA=PIN_B1, SCL=PIN_B0,FAST=400000) //#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7) #fuses NOWDT,NOPROTECT,NOLVP,XT #define EN PIN_C7 #define RW