Serial
Interfaces
©
PHYTEC Messtechnik GmbH 2010 L-750e_1
47
9.3
USB-Host Interface
The i.MX35 has an internal USB 2.0 Host with internal full-speed
PHY. The phyCARD-M is optionally populated with an NXP
ISP1760 High-Speed USB Host controller at U16 to also allow high-
speed USB HOST connectivity. Jumpers J18 - J20 and J25 select
either the internal PHY of the i.MX35 or the external USB HOST
controller at U16. They are installed prior to delivery and must not be
changed. An external USB Standard-A (for USB host connector is all
that is needed to interface the phyCARD-M USB Host functionality.
The applicable interface signals (D+/D-/ /PSW/FAULT) can be found
on the phyCARD-Connector.
P
IN
#
S
IGNAL
I/O
SL
D
ESCRIPTION
X2B2
3
X_USB_PRW2 O
VDD_3V3
USB-HOST Power switch
output open drain
X2B2
4
X_USB_OC2 I
VDD_3V3 USB-HOST over current
input signal
X2B2
7
X_USB_DM2 I/O
USB HOST transceiver
cable interface, D-
X2B2
8
X_USB_DP2 I/O
USB HOST transceiver
cable interface, D+
Table 16:
Location of the USB-Host signals