Answer / abdus sattar mollah

Microprocessor's have Von Nueman architecture i.e an
computer architecture where the program memory and data
memory are in the same memory hardware chip.So,both source
code(instructions) and the data are transmitted using same
bus.Also,in microprocessor the main CPU unit is in the
microprocessor chip ,other accesories chip required are
interfaced with the microprocessor chip ,externally.

Microcontroller's have Harvard architecture i.e both
program memory and data memory are in separate dedicated
mem0ry chip .Thus,different distinct buses transmitts
program codes and data.This result in increased speed but
also increased complexity in hardware.Also,all other
accesories chip like memory chip,I/o chip,Serial transfer
chip(USART) are within the microcontroller single chip.

This is the basic difference in architecture, due to which
several other diffrenece like access,working varies.

Answer / abdus sattar mollah

Motorola 68hc11 has 4kb of EEPROM for programming codes
and has 256 bytes of RAM for data storage...out of which 196 bytes are reserved and directly mapped with external I/O pins(four 8 bits I/O ports)

Answer / naveed t p

I think there are microcontrollers following Von neuman
architecture like motorolla 68HC11. Though most
microcontrollers are of harvard architecture.
I think the main difference is Microprocessor is a general
purpose device which can do processing, but doesnt have I/O
or memory. Whereas microcontroller is embedded system which
is dedicated with build in I/O & memory.

What is instrumentation control?

0 Answers  

---

Why do we go for 4-20mA? why not other standara?

6 Answers  

---

d/p flow transmitter LP side give to pressure.what you geting out put ? how you get(ma)?

6 Answers   ABB,

---

what's the criteria of using over range protector when installing Pressure Gauge

1 Answers  

---

while i check zero check for dp flow transmitter some fluctuating came (0 to 458 kg/h) what is the reason?

0 Answers   Petronas,

---

In turbine what does term CDP, NH, HSSOC means.

0 Answers   Takreer,

---

What is rated capacity in Control valve

3 Answers  

---

Can any body tell me about SAP MAINTINANCE MODULE. WHAT IS its function and application. And study material Source about it. I shall be very thankful.

0 Answers  

---

how to calibrate motorized operated valve?

1 Answers   Bilt, Jubilant, SRF,

---

What is the cv of a control valve?

2 Answers   CCIE,

---

how u meassure room temp?is it possible 2 meassure room temp by rtd or thermocouple?between rtd n thrmocouple which is more regard?3 meassure diff. between rtd n thermocouple?

3 Answers  

---

what is mean by loop checking?

8 Answers  

---