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UPD17708 Datasheet(PDF) 172 Page - NEC

No. de pieza UPD17708
Descripción Electrónicos  4-BIT SINGLE-CHIP MICROCONTROLLERS WITH DEDICATED HARDWARE FOR DIGITAL TUNING SYSTEM
PDF  356 Pages
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Fabricante Electrónico  NEC [NEC]
Página de inicio  http://www.nec.com/
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UPD17708 Datasheet(HTML) 172 Page - NEC

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µPD17704, 17705, 17707, 17708, 17709
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13.4 Timer 1
13.4.1 Outline of timer 1
Figure 13-17 outlines timer 1.
Timer 1 counts the basic clock (100, 10, 2, or 1 kHz) with an 8-bit counter, and compares the count value
with a value set in advance.
Figure 13-17. Outline of Timer 1
Remarks 1. TM1CK1 and TM1CK0 (bits 1 and 0 of timer 1 counter clock selection register: refer to Figure
13-18) set the basic clock frequency.
2. TM1EN (bit 3 of timer 1 counter clock selection register: refer to Figure 13-18) starts or stops
timer 1.
3. TM1RES (bit 2 of timer 1 counter clock selection register: refer to Figure 13-18) resets timer
1 counter.
Clock selection
4.5 MHz
Start/stop
Timre 1 counter (TM1C)
TM1CK1 flag
TM1CK0 flag
TM1EN flag
Coincidence detection circuit
TM1RES flag
DBF
Timer 1
IRQTM1 flag
Interrupt control
DBF
Timer 1 modulo register
(TM1M)



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