Microcontroller Discussions

RC Oscillator

Hi, When using an RC oscillator for the PIC's, is there a way to determine the frequency from the values of R and C? How...

3 comments posted 19yrs

posted by wthai1

3 comments posted 19yrs posted by wthai1

Pull up vs pulldown

For logic inputs, we can either use pull up resistors to 5V for pull down to ground. What are the pros and cons for both...

2 comments posted 19yrs

posted by wthai1

2 comments posted 19yrs posted by wthai1

low cost microcontroller with RS32

Hi I'm trying to build a simple system with a microcontroller and 2 RS232 ports to receive data on 1 port and send out...

5 comments posted 19yrs

posted by cyril.lim

5 comments posted 19yrs posted by cyril.lim

LCD

I want to program the text to a 2 line 5 x 7 LCD module. But before I do that in a language I am experimental with just...

9 comments posted 19yrs

posted by wthai1

9 comments posted 19yrs posted by wthai1

DS89C450 serial data transfer

I am having serial port communications problems. Below is the simple code in the DS89C450 MCU that I am trying to get t...

3 comments posted 19yrs

posted by eddie

3 comments posted 19yrs posted by eddie

PIC assembly code EEPROM

Hi, In PIC's such as the 16F84A, there is 64 bytes of EEPROM memory for data. How can you set some of these memory with...

1 comments posted 19yrs

posted by wthai1

1 comments posted 19yrs posted by wthai1

Serial to ethernet

I am using the DS89C450 mcu and would like to find the easiest/quickest solution to use TCP/IP. I was thinking of just u...

0 comments posted 19yrs

posted by eddie

0 comments posted 19yrs posted by eddie

Looking for very fast MCU, any advice?

Hello, I am using a PIC18F4620 as an universal "workhorse" in many applications and I like this MCU because of its vers...

7 comments posted 19yrs

posted by teuniz

7 comments posted 19yrs posted by teuniz

how to allocate large arrays in CCS

I have not been able to find information in the documentation for this question... How can I allocate an array of 512 b...

5 comments posted 19yrs

posted by starfire151

5 comments posted 19yrs posted by starfire151

Interfacing the DS12887 with PIC

Hello, I'm trying to interface the real-time clock DS12887 with PIC18F452 but since I'm new in these things I'm not get...

6 comments posted 19yrs

posted by ghstshll

6 comments posted 19yrs posted by ghstshll

external memory problem

I am using a 89C450MCL mcu running at 29.492mhz With just the micro, 74F573 (or 74HCT573 tried both) and a IS62C1024-35...

3 comments posted 19yrs

posted by eddie

3 comments posted 19yrs posted by eddie

External ROM read problem

I have a circuit using a DS89C450 micro and an external 1m(128kx8)ROM. I am using P1.0 as an upper address bit which is...

5 comments posted 19yrs

posted by eddie

5 comments posted 19yrs posted by eddie

PICtutor Send Program, Help!

Can anyone help?. My father purchased a PICtutor deluxe board many years ago. He has now decided at the age of 77 to ha...

3 comments posted 19yrs

posted by i.appleton

3 comments posted 19yrs posted by i.appleton

Where to download free PIC assembler / basic compiler?

I mean those fully function ones, not with limited function or with expiry date. Thanks.

1 comments posted 19yrs

posted by someone

1 comments posted 19yrs posted by someone

keypad and 7segment LEDs

I recently bought a 8051/8052 evaluation board with AT89S52, hex keypad, 6 digit 7seg LEDs and a beep. It's easy to fin...

0 comments posted 19yrs

posted by ericwan78

0 comments posted 19yrs posted by ericwan78