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HD64F2149YV Datasheet(PDF) 602 Page - Renesas Technology Corp |
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HD64F2149YV Datasheet(HTML) 602 Page - Renesas Technology Corp |
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602 / 1075 page  Section 17 Keyboard Buffer Controller Rev. 3.00 Jan 18, 2006 page 574 of 1044 REJ09B0280-0300 Receive data processing Clear KBF flag (KCLK = H) Processing 1 Receive operation ends normally [1] On the system side, drive the KCLK pin low, setting the I/O inhibit state. [1] Transmit enabled state. If there is transmit data, the data is transmitted. Figure 17.7 Sample Receive Abort Processing Flowchart (cont) Keyboard side monitors clock during receive operation (transmit operation as seen from keyboard), and aborts receive operation during this period. KCLK (pin state) KD (pin state) KCLK (input) KCLK (output) KD (input) KD (output) Reception in progress Receive abort request Transmit operation Start bit Figure 17.8 Receive Abort and Transmit Start (Transmission/Reception Switchover) Timing |
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