CDMA and GSM / UMTS Mini Card Hardware Integration Guide
62
Proprietary and Confidential
2130114
In the event of a discrepancy in values between this guide and the Product Specification Document (PSD), the PSD takes precedence.
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
/
MC8790
/
MC8790V
/
MC8791V
/
MC8792V)
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/ttyUSB
n
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.
46
GPIO_5
General Purpose I/O
a
47
RTS1 / PCM_DIN
UART Request To Send
or
PCM Data In
48
GPIO_6
General Purpose I/O
a
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
Table 5-1: MC8775V / MC8785V / MC8790V / MC8791V /
MC8792V 2.6 V connector pins
a
(Continued)
Pin
Signal name
Description
