| ??? 08/13/06 00:30 Read: times |
#122135 - Unrelated questions Responding to: ???'s previous message |
Ammar Ahmed said:
kindly tell me something about
1. TIMER FLAG 1 and TIMER FLAG 0? As Erik says, these are described in the so-called "bible" for the 8051. 2. What is the diference between SERIAL port and PRALLEL port? A serial port handles data bits serially; ie, one bit at a time, in sequence; A parallel port hanldes data bits in parallel; ie, all bits of a word simultaneously. The advantage of a serial port is that it takes less hardware - the same hardware (driver, pin, wire, receiver) is used for each bit in turn; the disadvantage is that the data has to be dismantled into individual bits for transmission, then reassembled on reception, and the transmission takes longer. The advantage of a parallel port is that a complete word is transmitted in one go - without dismantling or reassembling - so it's quicker; the disadvantage is that it takes more hardware - one driver, pin, wire, and receiver for each bit. 3. What is meant by GATE = 0 and GATE = 1? Err... exactly what part of this don't you understand? What is the context? 4. I have studied in a book that the following function gives one second delay in a microcontroller.. Either you have grossly over-simplified what the book said - to the point of omitting essential details - or the book is rubbish. 5. difference between 13BIT TIMER and 16 BIT TIMER? Err... 3 bits?! Again, exactly what part of this don't you understand? What is the context? |
