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7643 Datasheet(PDF) 351 Page - Renesas Technology Corp

Part # 7643
Description  8-BIT SINGLE-CHIP MICROCOMPUTER
PDF  424 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

7643 Datasheet(HTML) 351 Page - Renesas Technology Corp

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7643 Group
REJ09B0133-0200
APPENDIX
3.3 Notes on use
Rev.2.00
Aug 28, 2006
page 28 of 98
Fig. 3.3.4 Insulation connector connection
0.1
µF
680 pF
LPF pin
AVSS pin
1 k
Ω
C1
Ferrite Beads
Decoupling
Capacitors
C3
C4
C2
Vcc
Vss
AVcc
AVss
•Capacitor
C1, C2: 0.1
µF
C3, C4: 4.7
µF
Fig. 3.3.2 Circuit example for the proper positions of the peripheral components
Fig. 3.3.3 Passive components near LPF pin
XIN
enable
lock
FSE
LS
USBC5
enable
USB Clock
(48 MHz)
USB FCU
enable
USBC7
USB
transceiver
enable
USBC7
DC-DC converter
enable
USBC4
current
mode
USBC3
Ext. Cap.
D+
D-
Frequency Synthesizer
Note 1
Notes 1: In Vcc = 3.3 V, connect to Vcc. In Vcc =5 V, do not connect the external DC-DC
converter to the Ext. Cap pin.
2: The resistors values depend on the layout of the printed circuit board.
Note 2
See the circuit
example below.
Ext. Cap.
D+
D-
M37643
Vcc
(1) Vcc = 5 V (Using built-in DC-DC converter)
Note 2
Ext. Cap.
D+
D-
M37643
Vcc
(2) Vcc = 3.3 V (Not using built-in DC-DC converter)
5 V
3.3 V
Vcc
M37643



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