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UPD63 Datasheet(PDF) 55 Page - NEC |
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UPD63 Datasheet(HTML) 55 Page - NEC |
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55 / 68 page  55 µPD63, 63A, 64 13. APPLIED CIRCUIT EXAMPLE Example of Application to System · Remote-control transmitter (40 keys; mode selection switch accommodated) · Remote-control transmitter (48 keys accommodated) Remark When the POC circuit of the mask option is used effectively, it is not necessary to connect the capacitor enclosed in the dotted lines. KI/O6 KI/O7 S0 S1/LED REM VDD XOUT XIN GND RESET KI/O5 KI/O4 KI/O3 KI/O2 KI/O1 KI/O0 KI3 KI2 KI1 KI0 Key matrix 8 × 5 = 40 keys Mode selection switch + + KI/O6 KI/O7 S0 S1/LED REM VDD XOUT XIN GND RESET KI/O5 KI/O4 KI/O3 KI/O2 KI/O1 KI/O0 KI3 KI2 KI1 KI0 Key matrix 8 × 6 = 48 keys + + |
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