| Basic
89c51/52 Circuit This circuit is enough to get the blinking program running on an 89c51 or 89c52 |
 (click
thumbnail) |
| Basic
TI MSP430F149 Circuit Could be used as a starting circuit for TI MSP430F149 based projects. I used the low cost JTAG programmer from www.olimex.com. The circuit is also available on their site. |
Simple Blink Test for 89c51/52 (805x): (blink.a51)
Asm code, illustrates use of timer and its interrupt to blink ports.
Simple Serial port test program in asm.
This program would send "Ha" repeatedly on the serial line, at 9600 baud
Use this program to Check whether your basic Serial Setup/connection is working
An example program in C to introduce some peculiarities of Keil-C cross compiler tools.
The Program waits for a character from PC on serial port, and either opens/closes a door or its lock depending on it. If the sent char is "B" 3 times, sounds an alarm.
Compile this program, and simulate it. Open port 0 window. type capital B 3 times in the serial window, and observe P0.7 blinking. P0.7 was connected to a buzzer in actual hardware.
Though most EDP projects tend to use the AT89C52. The following microcontrollers are the ones I like. They are all available in Local Market in India. People who need features which are are not in 89c52 (like the most commonly needed ADC), should consider these and other options too.
| 80C535 | By Siemens (Infineon). Really good chip with ADC, | But no program memory. External EPROM needed. About Rs. 400 to 550. |
| 89C552 | By Phillips. Good chip with ADC, I2C | But no program memory. External EPROM needed. Rs. 350 types. |
| PIC16F877 | By Microchip. Great chip!! almost everything in one chip. ADC, I2C, EEPROM | But Instruction set and architecture is different than Intel cores. But user can apply his 8085 knowledge and learn it as quickly as one would learn 8051 in edl. |
| AT89c2051 | By Atmel. Cute 20 pin version of 8051, with 2 analog comparators! 2.7 V to 5.5 Operating Voltage. | Obviously, no external memory support and low pin count means for small applications. Rs. 65 types |
| P89C668 | 64KB Flash!! 8KB RAM, ISP, In-Application-Programable, upto 33Mhz, I2C, PWM | Rs. 600 types. |
| AT89S8251 | AT89c52 with 2KB EEPROM built-in | |
| APR6016 | Not a Microcontroller. But good speech/sound storing chip. | |
| MSP430F149 | My Fav. Microcontroller. By TI. 16Bit processor. Ultra low power with almost everything. 12bit ADC, SPI, 60K Flash, 2K ram, 256B EEPROM, RISC architecture! and what not | Architecture and Instruction set is totally different than intel 8051 core. Not available in Local Market. and comes in TSSOP SMD package- hence soldering is not in reach of beginners, thus requires good hardware design in first shot. no external mem support. Supply 3.3V max! |
EDL02.PDF - "Using
Microcontrrollers in EDP":
The presentation i gave on 5th
Feb. 2002
oppcb.pdf
- "The PCB Is a Component of Your Op-Amp
Design"
By Bruce Carter, Senior Applications
Specialist, Texas Instruments, Inc
Good article on design issues of PCB for Op-Amp and mixed signal circuits
Vivek Vaid
vivekvaid<|a-t|>iitb_ac_in
(for email address: replace <|a-t|> by @ above and _ by . )
