what does the A in 16F877A means?

Started by mr_gees100_peas in Piclist11 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 Piclist14 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


PIC 16F877A And SI 3000

Started by that dude in Piclist10 years ago

I was trying to create a simple Audio processor using a Micro chip 16F877A and a SI3000 chip. I am having trouble figuring out what the best way...

I was trying to create a simple Audio processor using a Micro chip 16F877A and a SI3000 chip. I am having trouble figuring out what the best way to interface the two chips together. I was wondering if anyone had suggestions or ideas on what i could do. Thanks in advance


Programmer for 16F877A

Started by fjch100 in Piclist14 years ago 1 reply

Somebody has a free programmer(or link) for the 16F877A in internet? Can I modifie a "Classic" Flash PIC (TAIT) for that? or I need...

Somebody has a free programmer(or link) for the 16F877A in internet? Can I modifie a "Classic" Flash PIC (TAIT) for that? or I need change the software?


Uregnt help needed(Problems with my oscillator for PIC 16f877a)

Started by Aravind in Piclist14 years ago 3 replies

I have a PIC 16F877A I/P(a sample I got from microchip). I am not able to make it run properly using a 4Mhz resonator. I used 15pF ...

I have a PIC 16F877A I/P(a sample I got from microchip). I am not able to make it run properly using a 4Mhz resonator. I used 15pF capacitors as mentioned in the datasheet and also tried it out with 33pF and 47pF. It blinks properly for some time and then it either stops blinking


Differences in PicBasic Pro code between a 16F877A and 16C765

Started by castaways3373 in Piclist14 years ago 1 reply

i have a code that i wrote and tested on a 16F877A. i couldn't use a 16C765 because i didn't have any 24MHz xtals, but now that i...

i have a code that i wrote and tested on a 16F877A. i couldn't use a 16C765 because i didn't have any 24MHz xtals, but now that i do, i can't successfully program the same code onto the 16C765. the progam will read in a value from a separate A/D and then output the data serially.


PIC 16F877A problems...

Started by shet...@gmail.com in Piclist10 years ago 3 replies

I'm trying to get PIC 16F877A to work with a 20Mhz crystal. I'm a beginner with PIC, tho i have decent exp with other controllers. i'm having...

I'm trying to get PIC 16F877A to work with a 20Mhz crystal. I'm a beginner with PIC, tho i have decent exp with other controllers. i'm having problems trying to get it to work. If i understand correctly, the crystal needs to be connected between osc1 and osc2 pins with caps to ground. I'm using hi-tech's PICC and tide to compile and assemble the program, which i then burn to the chip. the prog...


CCS M I2C 16f648A & 16F877A

Started by Harrie Geerts in Piclist13 years ago

I'm using CCS M compiler. I want an interface I2C between a master 16f648A and a slave hardware I2C 16F877A. I'm...

I'm using CCS M compiler. I want an interface I2C between a master 16f648A and a slave hardware I2C 16F877A. I'm succeeded in sending commands from the 648A to the 877A. But I can't transmit data from the 877A to 648A. Does anybody have an example.


16F877A and I2C pull up resistors

Started by Dennis Clark in Piclist13 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?


HCTL-2016

Started by gsml1980 in Piclist14 years ago

Hi I've been spending the last 2-3 days trying to interface this motor decoder/counter IC with a 16F877A. However the IC does...

Hi I've been spending the last 2-3 days trying to interface this motor decoder/counter IC with a 16F877A. However the IC does respond to the commands I give to it! Does anyone have experience with this IC before? Is there any thing i should take notice of? Regards Louis


40 pin sockets

Started by jrem123 in Piclist13 years ago 5 replies

What do you guys use to remvove a 40pin chip like the 16F877A from a dual wipe socket? I've been looking around Mouser for...

What do you guys use to remvove a 40pin chip like the 16F877A from a dual wipe socket? I've been looking around Mouser for something to no avail . . . Regards, John.


which is the best pic for robotics

Started by mr_gees100_peas in Piclist11 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


programming the 16F877A

Started by nford85 in Piclist14 years ago 2 replies

Hi I am new to PICs, so my problem is probably the result of my inexperience with them. I have built a WISP628 programmer and ...

Hi I am new to PICs, so my problem is probably the result of my inexperience with them. I have built a WISP628 programmer and managed to get it working with a bunch of PICs(16F84A, 16F628, 18F252, 18F452). However, when I try to program an 877A with the WISP, XWisp g


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

Started by mr_gees100_peas in Piclist11 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++ ...


Help with Equates for a Newbie

Started by jsternmd in Piclist8 years ago 25 replies

I am going nuts with a 16F877A project based on siggen3a/IQPro, a DDS project. Please try to help me understand the following. In the...

I am going nuts with a 16F877A project based on siggen3a/IQPro, a DDS project. Please try to help me understand the following. In the various forms of DDS code when assembled without any linker file - all single assembly, there are general equates of the form: ; ****************************************************************** ; Set up upper frequency limit = 30,000,000 = 0x01C9C380 l...


GameBoy Camera

Started by integrodev in Piclist14 years ago 6 replies

Hello, how are you? I have a question about the GameBoy camera, did anybody interface it with PIC 16F877A and pic basic pro? I...

Hello, how are you? I have a question about the GameBoy camera, did anybody interface it with PIC 16F877A and pic basic pro? I made a code for it but it isn't working. I think I don't know how to set the registers to the camera so it can't start to send me analog voltage? Ca


20Mhz oscillator and 16f877

Started by xeemv in Piclist14 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


need help pls

Started by cmanmcm in Piclist14 years ago 2 replies

hi everyone, pls help me , I have o problem with 16f877a programming. I built a JDM interface and I run ic-prog for flash...

hi everyone, pls help me , I have o problem with 16f877a programming. I built a JDM interface and I run ic-prog for flash writing. the problem is that the writing is made wrong, it seems that the ic-prog doesn't know the target for programming (even I set from dev


INPUT Line Problem

Started by integrodev in Piclist14 years ago 9 replies

Dear PICLIST group, I have a question. I wanted to make a program to check if the portb 7 I/O is high or low and depending on...

Dear PICLIST group, I have a question. I wanted to make a program to check if the portb 7 I/O is high or low and depending on the status of it to change the status of portb 6! I am using pic 16F877A. I put + 5V on portb 7 but the status doesn't change. Can you help me to so


pic16f877a uart problem

Started by siva...@gmail.com in Piclist9 years ago 6 replies

Hai to all, Iam trying to communicate from pic 16f877a to the pc's hyperterminal at 9600 baud rate. Iam posting my code for this. Iam able...

Hai to all, Iam trying to communicate from pic 16f877a to the pc's hyperterminal at 9600 baud rate. Iam posting my code for this. Iam able to simulate with mplab but I could not implement with hardware. I checked for max232, rs232. They seem to be working perfect. But iam not getting the data through hyperterminal comm port. My crystal oscillator is 8mhz. /* uart serial communication a...