7643 datasheet(285/424 Pages) RENESAS

285 / 424 page

Rev.2.00

Aug 28, 2006

page 164 of 202

7643 Group

REJ09B0133-0200

APPLICATION

2.6 USB

Fig. 2.6.58 Peripheral circuit example

Fig. 2.6.59 LPF peripheral circuit

Fig. 2.6.60 Connection of insulation connector

➀ Vcc=5V(built-in DC-DC converter used)

M37643

Vcc

Ext.Cap

D+

D-

➁ Vcc=3V (DC-DC converter disabled)

M37643

Vcc

Ext.Cap

3.3V

D+

D-

VCC

XIN

Frequency synthesizer

enable

lock

FSE

USBC5

enable

USB Clock

(48MHz)

USB FCU

enable

USBC7

USB

transceiver

enable

USBC7

DC-DC converter

enable

USBC4

current

mode

USBC3

Ext.Cap

D-

Notes 1: The resistor value depends on the layout of printed circuit board.

2: When Vcc = 5 V, do not connect the external DC-DC converter to the Ext.Cap pin.

Note 1

D+

Peripheral circuit

example is shown

below.

Note 1

Note 2

0.1

µF

680pF

LPF pin

AVSS pin

Vcc

Ferrite Beads

Decoupling

Capacitors

AVcc

Vss

AVss

Capacitor C1, C2 : 0.1

µF

C3, C4 : 4.7

µF

7643 Datasheet(PDF) 285 Page - Renesas Technology Corp

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