UPD64A 查看數據表（PDF） - NEC => Renesas Technology

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UPD64A

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

NEC => Renesas Technology 

µPD64A, 65

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) to enable the 1-bit timer output, and a zero detector.

Figure 4-1. Timer Configuration

S1/LED

REM

Carrier

synchronous

circuit

Bit 3 of control register 0 (P3)

T

T1

T0

Count

t9

t8 t7

t6 t5 t4 t3

t2 t1 t0 clock

9-bit down counter

fX/64

fX/128

Zero detector

Timer operation end signal

(HALT #×101B release

signal)

Bit 2 of control register 0 (P3)

Carrier signal

Data Sheet U14380EJ3V0DS00

19

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