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UPD62AMC Datasheet(PDF) 19 Page - NEC

Part # UPD62AMC
Description  4-BIT SINGLE-CHIP MICROCONTROLLER FOR INFRARED REMOTE CONTROL TRANSMISSION
PDF  62 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD62AMC Datasheet(HTML) 19 Page - NEC

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19
µPD62A
Data Sheet U14474EJ1V0DS00
4. TIMER
4.1 Timer Configuration
The timer is the block used for creating a remote control transmission pattern. As shown in Figure 4-1, it consists
of a 9-bit down counter (t8 to t0), a flag (t9) enabling 1-bit timer output, and a zero-detection circuit.
Figure 4-1. Timer Configuration
S1/LED
REM
Carrier
synchronous
circuit
Bit 2 of control register 0 (P3)
Carrier signal
Zero-detection circuit
9-bit down counter
t9
t8
t7
t6
t5
t4
t3
t2
t1
t0
T
T1
Bit 3 of control register 0 (P3)
fX/64
fX/128
Timer operation end signal
(HALT #
×101B release
signal)
Count
clock
T0



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