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what does the A in 16F877A means?

Started by mr_gees100_peas in Piclist18 years ago 6 replies

Hi, For a while now I've been wondering what does the A in 16F877A means? I mean what is the difference between a 16F877 and a 16F877A? ...

Hi, For a while now I've been wondering what does the A in 16F877A means? I mean what is the difference between a 16F877 and a 16F877A? My other question is what is a bootloader?


16F877 programing Vs 16F877A

Started by fjch100 in Piclist21 years ago 3 replies

Hi, I'm using the Tait Flash PIC Programmer and "Classic" interface, I can program a 16F877 but not a 16F877A, what is the...

Hi, I'm using the Tait Flash PIC Programmer and "Classic" interface, I can program a 16F877 but not a 16F877A, what is the difference between both? I can read, erase but not Write the 16F877A. With the 16F877 everything works OK. I try changing the differents soft


16F877A and I2C pull up resistors

Started by Dennis Clark in Piclist19 years ago 9 replies

I have a weird issue. I've used the hardware I2C on the PIC 16F77 with no problems between multiple chips using 2.7K to 4.7K ...

I have a weird issue. I've used the hardware I2C on the PIC 16F77 with no problems between multiple chips using 2.7K to 4.7K pull up resistors very successfully. However when using the 16F877A I'm finding that I2C isn't reliable at all unless I use 22K to 47K pull ups. Weird huh?


which is the best pic for robotics

Started by mr_gees100_peas in Piclist18 years ago 7 replies

Hi, I was wondering if there is a preference ina aprticualr PIC model that is use more often for robotic. I know the 16f877a is a...

Hi, I was wondering if there is a preference ina aprticualr PIC model that is use more often for robotic. I know the 16f877a is a good general purpose but is there anything better. I mean, something that is 1) well supported, 2) has plenty of program memory 3) has the features that robot builders like like PWM ADC channels and what not. Again, it has to be something common. Maybe theres


what is the easiest way to control a pic from a pc?

Started by mr_gees100_peas in Piclist18 years ago 16 replies

Lets ay you are on a budget and you already have some 16f877a pics laying around and a bunch of other parts (resistors, caps etc etc). You have...

Lets ay you are on a budget and you already have some 16f877a pics laying around and a bunch of other parts (resistors, caps etc etc). You have your compiler and pic programer and what not. Now you want to create a program and control your pic. Maybe make it blink an LED. SOmethignsimple. What would be the easiest way to do this. Take into account the cost. For example you can get free C/C++ ...


20Mhz oscillator and 16f877

Started by xeemv in Piclist21 years ago 4 replies

I have trouble getting the 20 Mhz oscillator to work with 16f877A Oscillator: Saronix 9942k 20.0000 Mhz NCH060C This is what I...

I have trouble getting the 20 Mhz oscillator to work with 16f877A Oscillator: Saronix 9942k 20.0000 Mhz NCH060C This is what I have done so far: 1) I connect the 20 Mhz oscillator to the OSC1 of the PIC and leave the OSC2 open. 2) I define my oscillator speed as


pic 16f877a with lcd flickering problem

Started by siva...@gmail.com in Piclist15 years ago 14 replies

hai to all, Iam using pic16f877a and 16 x 2 lcd to display my string as an array. The problem is when i touch the crystal legs, I could find...

hai to all, Iam using pic16f877a and 16 x 2 lcd to display my string as an array. The problem is when i touch the crystal legs, I could find the characters display steadily or else the display is flickering. I use a 4mhz crystal. I even grounded the body of the crystal. But eventhen the problem occurs. I use 33pf decoupling capacitors for the crystals. Please help me out. thanks siv...



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