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LM8328 Datasheet(PDF) 12 Page - Texas Instruments |
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LM8328 Datasheet(HTML) 12 Page - Texas Instruments |
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12 / 56 page  LM8328 SNLS328A – AUGUST 2011 – REVISED MARCH 2013 www.ti.com The event buffer content and the REVTINT and RELINT (lost event) interrupt bits are also cleared if the KBDIC.EVTIC bit is set. Interrupt bits in the masked interrupt register KBDMIS follow the masked KBDRIS status. In order to support efficient Multi-byte reads from EVTCODE, the autoincrement feature is turned off for this register. Therefore the host can continuously read the complete EVTCODE buffer by sending one command. Figure 8. Example Host Reacting to Interrupt for Keypad Event MULTIPLE KEY PRESSES The LM8328 supports up to four simultaneous key presses. Any time a single key is pressed KBDCODE0 is set with the appropriate key code. If a second key is pressed, the key is stored in KBDCODE1 and the MULTIKEY flag of KBDCODE0 is set. Additional key presses are stored in KBDCODE2 and KBDCODE3 accordingly. The four registers signal the last multi key press events. All events are stored in parallel in the EVTCODE register for the complete set of events. All KBDCODE[3:0] registers are cleared on read. 12 Submit Documentation Feedback Copyright © 2011–2013, Texas Instruments Incorporated Product Folder Links: LM8328 |
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