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Zakładka z wyszukiwarką danych komponentów |
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Zakładka z wyszukiwarką danych komponentów |
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STMPE2401 Arkusz danych(PDF) 44 Page - STMicroelectronics |
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STMPE2401 Arkusz danych(HTML) 44 Page - STMicroelectronics |
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44 / 55 page  Keypad controller STMPE2401 44/55 13.6 KPC_ctrl_lsb register 13.7 Data registers The KPC_DATA register contains three bytes of information. The first two bytes store the key coordinates and status of any two keys from the normal key matrix, while the third byte store the status of dedicated keys. Table 42. KPC_ctrl_lsb register Bit 7 654 3 2 1 0 Name DB_0 ~ 5 SCAN Read/Write WW W WWW W W Reset Value 0 000 0 0 0 0 Bit Name Description 7 DB_6 0-128ms of de-bounce time 6DB_5 5DB_4 4DB_3 3DB_2 2DB_1 1DB_0 0 SCAN ‘1’ to start scanning; ‘0’ to stop Table 43. KPC_data_byte0 register Bit 7 6 5 432 1 0 Name Up/Down R3 R2 R1R0C2 C1 C0 Read/Write R R R RRR R R Reset Value 1 1 1 110 0 0 Bit Name Description 7 Up/Down ‘0’ for key-down, ‘1’ for key-up 6 R3 row number of key 1 (valid range : 0-11) 0x1111 for No Key 5R2 4R1 3R0 2 C2 column number of key 1 (valid range : 0-7) 1C1 0C0 |
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