User's Manual


PDS6_HIO_v02.800
Confidential / Preliminary
2014-10-27
Cinterion
®
PDS6 Hardware Interface Overview
2 Interface Characteristics
Page 10 of 35
2 Interface Characteristics
PDS6 is equipped with an SMT application interface that connects to the external application.
The SMT application interface incorporates the various application interfaces as
well as the
RF antenna interface.
2.1 Application Interface
2.1.1 USB Interface
PDS6 supports a USB 2.0 High Speed (480Mbit/s) device interface that is Full Speed
(12Mbit/s) compliant. The USB interface is primarily intended for use as command and
data
interface and for downloading firmware.
The external application is responsible for supplying the VUSB_IN line. This line is used for ca-
ble detection only. The USB part (driver and transceiver) is supplied by means of BATT+. This
is because PDS6 is designed as a self-powered device compliant with the “Uni- versal Serial
Bus Specification Revision 2.0”
1
.
Module
USB part
1)
VREG (3V075)
lin. reg.
SMT
BATT+
GND
VBUS
DP
DN
Detection only
R
S
R
S
VUSB_IN
USB_DP
2)
USB_DN
2)
Host wakeup
RING0
H_WAKEUP
1)
All serial (including R
S
) and pull-up resistors for data lines are implemented.
2)
If the USB interface is operated in High Speed mode (480MHz), it is recommended to take
special care routing the data lines USB_DP and USB_DN. Application layout should in this
case implement a differential impedance of 90Ohm for proper signal integrity.
Figure 2: USB circuit
To properly connect the module's USB interface to the external application, a USB 2.0 compat-
ible connector and cable or hardware design is required. Furthermore, the USB modem driver
distributed with PDS6 needs to be installed.
1. The specification is ready for download on http://www.usb.org/developers/docs/