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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
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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 lines required are 16+16 =32
(iii) 64 - 64 keys can be arranged in a matrix of 8X8, so number of port lines required are 8+8 =16
(iv) 144 -144 keys can be arranged in a matrix of 12X12, so number of port lines required are 12+12 =24
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