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UPD178004A Datasheet(PDF) 18 Page - NEC |
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UPD178004A Datasheet(HTML) 18 Page - NEC |
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18 / 56 page  18 µPD178004A, 178006A, 178016A, 178018A Figure 5-5. Watchdog Timer Block Diagram Control Circuit 8-Bit Counter Prescaler INTWDT Non-Maskable Interrupt Request INTWDT Maskable Interrupt Request Reset Selector 2 f xx 4 2 f xx 5 2 f xx 6 2 f xx 7 2 f xx 8 2 f xx 9 2 f xx 11 2 f xx 3 5.4 BUZZER OUTPUT CONTROL CIRCUIT The clock with the following frequency can be output as a buzzer output. • 1.5 kHz/3 kHz/6 kHz (@ 4.5-MHz crystal oscillator with system clock) Figure 5-6. Buzzer Output Control Circuit Block Diagram Internal Bus 1.5 kHz 3 kHz 6 kHz TCL27 TCL26 TCL25 3 PM36 Timer Clock Select Register 2 Port Mode Register 3 BEEP/P36 P36 Output Latch |
Similar Part No. - UPD178004A |
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Similar Description - UPD178004A |
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