UPD178002 데이터 시트보기 (PDF) - NEC => Renesas Technology

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UPD178002

8-BIT SINGLE-CHIP MICROCONTROLLERS

NEC => Renesas Technology 

µPD178002, 178003

5.7 PLL Frequency Synthesizer

Figure 5-7. Block Diagram of PLL Frequency Synthesizer

Mixer

PLL mode

select register

(PLLMD)

PLL PLL

MD1 MD0

Internal bus

PLL data register

(PLLRL, PLLRH, PLLR0)

PLL

data transfer register

(PLLNS)

PLL

NS0

VCOH

VCOL

2

Input select

block

2

Programmable

divider

fN

Phase

comparator

fr

( φ -DET)

Charge

pump

EO1

EO0

Voltage

Note

control

generator

Note

Low pass

filter

4.5 MHz

Reference

frequency

generator

4

Unlock

FF

PLL PLL PLL PLL

PLL

RF3 RF2 RF1 RF0

UL0

PLL reference

mode register

(PLLRF)

PLL unlock

FF judge

register

(PLLUL)

Internal bus

Note External circuit

20

Data Sheet U12628EJ3V0DS00

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