Datasheet

Section 22 USB Function Module (USB)
Rev. 2.00 Aug. 20, 2008 Page 889 of 1198
REJ09B0403-0200
Notes:
1.
2.
To protect this LSI from being damaged, use the IC (such as HD74LV-A Series) which can
be applied voltage even when the system power is turned off.
Prevent noise from the VBUS pin while the USB is performing communication.
3.3 V
VBUS
(5 V)
Vcc
(3.3 V)
DrVCC
(3.3 V)
USD+
D+
VBUS*
2
PM4
Vcc
*
1
Vcc
*
1
USD- DrVSS Vss
GND
D-
USB connector
On-chip transceiver
External pull-up
control circuit
supporting full-speed
PULLUP_E
USB
1.5 kΩ
Figure 22.22 Example of Circuitry in Self-Powered Mode