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3819 Datasheet(PDF) 27 Page - Renesas Technology Corp |
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3819 Datasheet(HTML) 27 Page - Renesas Technology Corp |
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27 / 218 page  13 3819 Group SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER MITSUBISHI MICROCOMPUTERS Fig. 4 Port block diagram (1) (4) Ports P24–P27, P41, P60, PB3 Direction register Port latch Data bus (3) Ports P20–P23 (2) Ports P12–P17 (1) Ports P0, P10, P11 Port latch D/P switch register Dimmer signal (Note) Shift signal to next stage Blanking signal for key-scan Data bus Shift signal from previous stage Port latch VEE Shift signal from previous stage Data bus Shift signal to next stage Dimmer signal (Note) Shift signal to next stage Data bus Shift signal from previous stage Port latch S/D switch register Local data bus Blanking signal for key-scan Dimmer signal (Note) VEE VEE V V V V : High-breakdown-voltage P-channel transistor Note: The dimmer signal sets the Toff timing. |
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