PD178002_15 Datasheet, PDF(22/50 Page) Renesas Technology Corp

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PD178002_15 Datasheet, PDF (22/50 Pages) Renesas Technology Corp – 8-BIT SINGLE-CHIP MICROCONTROLLERS

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ÂµPD178002, 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

Input select

block

Programmable

divider

Phase

comparator

( Ï -DET)

Charge

pump

EO1

EO0

Voltage

Note

control

generator

Note

Low pass

filter

4.5 MHz

Reference

frequency

generator

Unlock

PLL PLL PLL PLL

PLL

RF3 RF2 RF1 RF0

UL0

PLL reference

mode register

(PLLRF)

PLL unlock

FF judge

(PLLUL)

Internal bus

Note External circuit

Data Sheet U12628EJ3V0DS00

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