Friday, 15 May 2015

Q 61,paper 3, J 12. Identify the devices given below with their IC numbers :


(i) USART ----------------(a) 8251
(ii) Micro controller----- (b) 8051
(iii) Interrupt controller -(c) 8259
(iv) DMA controller ------(d) 8257
-----(i) (ii) (iii) (iv)
(A) (a) (b) (c) (d)
(B) (b) (a) (d) (c)
(C) (c) (d) (a) (b)
(D) (d) (a) (b) (c)
Answer (A)

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