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Error! No text of specified style in document. - System Integration Manual
CDMA-2X-11004-P1 Objective Specification System description
Page 48 of 79
41 Reference 42 Description 43 Part Number - Manufacturer
47 C2
48 100 nF Capacitor Ceramic X7R 0402 10%
16 V
49 GRM155R61A104KA01 - Murata
Table 13: Component for USB application circuit
If the USB interface is not connected to the application processor, it is highly recommended
to provide direct access to the VUSB_DET, USB_D+, USB_D- lines for execution of firmware
upgrade over USB and for debug purpose: testpoints can be added on the lines to
accommodate the access. Otherwise, if the USB interface is connected to the application
processor, it is highly recommended to provide direct access to the RxD, TxD, CTS and RTS
lines for execution of firmware upgrade over UART and for debug purpose. In both cases,
provide as well access to RESET_N pin, or to the PWR_ON pin, or enable the DC supply
connected to the VCC pin to start the module firmware upgrade
If the USB interface is not used, the USB_D+, USB_D- and VUSB_DET pins can be left
unconnected, but it is highly recommended to provide direct access to the lines for
execution of firmware upgrade and for debug purpose.
49.1.1 MUX Protocol (3GPP 27.010)
Error! No text of specified style in document. modules have a software layer with MUX functionality,
3GPP TS 27.010 Multiplexer Protocol [7], available on the UART physical link. The USB interface
doesn’t support the multiplexer protocol.
This is a data link protocol (layer 2 of OSI model) which uses HDLC-like framing and operates
between the module (DCE) and the application processor (DTE) and allows a number of
simultaneous sessions over theUART: the user can concurrently use AT command interface on one
MUX channel and Packet-Switched Data communication on another MUX channel.. Each session
consists of a stream of bytes transferring various kinds of data such as SMS, PSD, AT commands in
general. This permits, for example, SMS to be transferred to the DTE when a data connection is in
progress.
The following virtual channels are defined:
 Channel 0: control channel
 Channel 1;AT commands
 Channel 2: data connection
49.2 Reserved pins (RSVD)
Error! No text of specified style in document. modules have pins reserved for future use. All the RSVD
pins/pads must be left unconnected on the application board.
Comment [rjc4]: Again SW lead needs to
state compliance to feature list.. Stefano
may be able to provide comments