State number of portlines required for a keyboard matrix having following keys: (i) 16 (ii) 256 (iii) 64 (iv) 144

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teamques10 ★ 69k

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embedded systems

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written 6.2 years ago by

teamques10 ★ 69k

Number of port lines required for a keyboard matrix having following keys:

(i) 16 -16 keys can be arranged in a matrix of 4X4, so number of port lines required are 4+4 =8

(ii) 256 - 256 keys can be arranged in a matrix of 16X16, so number of port …

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