Advertisement
USB
PULLUP_E
Vcc
PM4
(3.3 V)
Vcc
Vcc
1
*
External pull-up
control circuit
supporting full-speed
Notes:
1.
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.
2.
Prevent noise from the VBUS pin while the USB is performing communication.
Figure 22.22 Example of Circuitry in Self-Powered Mode
DrVCC
2
VBUS*
(3.3 V)
*
1.5 kΩ
Section 22 USB Function Module (USB)
On-chip transceiver
USD+
USD-
DrVSS
1
VBUS
D+
D-
GND
(5 V)
USB connector
Rev. 1.00 Mar. 12, 2008 Page 891 of 1178
Vss
REJ09B0403-0100
Advertisement
