UPD62A View Datasheet(PDF) - NEC => Renesas Technology

Part Name

Description

Manufacturer

UPD62A

4-BIT SINGLE-CHIP MICROCONTROLLER FOR INFRARED REMOTE CONTROL TRANSMISSION

NEC => Renesas Technology 

µPD62A

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 3 of control register 0 (P3)

T

T1

T0

Count

clock

t9

t8 t7 t6 t5 t4 t3 t2 t1 t0

fX/64

9-bit down counter

fX/128

Zero-detection circuit

Timer operation end signal

(HALT # ×101B release

signal)

Bit 2 of control register 0 (P3)

Carrier signal

Data Sheet U14474EJ1V0DS00

19

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