Specifications

PLS63-W Hardware Interface Overview
2 Interface Characteristics
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2 Interface Characteristics
PLS63-W is equipped with an SMT application interface that connects to the external applica-
tion. 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
PLS63-W supports a USB 2.0 High Speed (480Mbit/s) device interface that is Full Speed
(12Mbit/s) compliant. The USB I/O pins are capable of driving the signal at min 3.0V. The im-
pedances, serial and pull up resistors are implemented according to “Universal Serial Bus
Specification Revision 2.0”
1
, No further additional components are required.
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 PLS63-W is designed as a self-powered device compliant with the “Universal Serial
Bus Specification Revision 2.0”.
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. For more information on the USB re-
lated signals see Table 3. Furthermore, the USB modem driver distributed with PLS63-W
needs to be installed.
1. The specification is ready for download on http://www.usb.org/developers/docs/
VBUS
DP
DN
VREG (3V075)
BATT+
USB_DP
2)
lin. reg.
GND
Module
Detection only
VUSB_IN
USB part
1)
1)
All serial (including R
S
) and pull-up resistors for data lines are implemented.
USB_DN
2)
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 90 ohms for proper signal integrity.
R
S
R
S
SMT