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IK2108A Datasheet(PDF) 8 Page - IK Semicon Co., Ltd |
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IK2108A Datasheet(HTML) 8 Page - IK Semicon Co., Ltd |
8 / 21 page IK2108A 8 May 2012, Ver. 03 KEY MATRIX & KEY INPUT DATA STORAGE RAM Key Matrix consists of 10 x 3 array as shown below: K1 K2 K3 SG1/ KS1 SG2/ KS2 SG3/ KS3 SG4/ KS4 SG5/ KS5 SG6/ KS6 SG7/ KS7 SG8/ KS8 SG9/ KS9 SG10/ KS10 Each data entered by each key (or any combination of keys) is stored as follows and read by a READ Command, starting from the last significant bit. When the most significant bit of the data (b0) has been read, the least significant bit of the next data (b7) is read. K1 K2 K3 K1 K2 K3 SG1/KS1 SG2/KS2 x 1’st byte read SG3/KS3 SG4/KS4 x 2’nd byte read SG5/KS5 SG6/KS6 x 3’rd byte read SG7/KS7 SG8/KS8 x 4’th byte read SG9/KS9 SG10/KS10 x 5’th byte read b0 b1 b2 b3 b4 b5 b6 b7 Key press=”1”, Key no press=”0” read. |
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