Usb Interface; Usb Handshaking - Sierra Wireless MC5725 Hardware Integration Manual

CDMA and GSM / UMTS Mini Card Hardware Integration Guide
62
In the event of a discrepancy in values between this guide and the Product Specification Document (PSD), the PSD takes precedence.
Table 5-1: MC8775V / MC8785V / MC8790V / MC8791V /
MC8792V 2.6 V connector pins
Pin Signal name
46 GPIO_5
RTS1 / PCM_DIN
47
48 GPIO_6
49 RXD1 / PCM_DOUT UART Receive Data or PCM Data Out
51 TXD1 / PCM_SYNC UART Transmit Data or PCM Sync
a. This table is abstracted from the PSD—the PSD takes precedence
b. No defined function—reserved for future use

USB interface

The USB interface is the only path for communication between
the host and module.
The interface complies with the Universal Serial Bus Specifi‐
cation, Rev 2.0.
Features of the USB interface include:
Support for the full‐speed (12 Mbps) data rate
•
• (MC8785V / M C8790 / M C8790V / M C8791V / M C8792V)
Support for the high‐speed (480 Mbps) data rate
Transfer of general, phone diagnostic, and over‐the‐air data
•
between the module and the host
Enumeration of the module as a set of Modem (MC57xx) or
•
COM (MC57xx and MC87xx) ports, using host Windows
drivers
• Enumeration of the module as a set of /dev/ttyUSBn devices
for Linux systems with the Sierra Wireless driver installed
• USB‐compliant transceivers

USB handshaking

Note: If you are using the Windows or Linux drivers provided by
Sierra Wireless, you can skip this section — it is intended for devel-
opers who are creating their own USB drivers.
The host must act as a USB host device to interface with the
module.
Proprietary and Confidential
a
(Continued)
Description
a
General Purpose I/O
UART Request To Send or PCM Data In
a
General Purpose I/O
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