Error! No text of specified style in document. - System Integration Manual
CDMA-2X-11004-P1
Objective Specification
System description
Page 40 of 79
40.4
Serial communication
Error! No text of specified style in document. modules provide the following serial communication
interfaces where AT command interface and Packet-Switched Data communication are
concurrently available:
One asynchronous serial interface (UART) that provides RS-232 functionality conforming to
ITU-T V.24 Recommendation [4], with limited data rate. One full-speed USB 2.0 compliant
interface, with maximum data rate of 12 Mb/s.
Error! No text of specified style in document. modules are designed to operate as a CDMA wireless
modem, which represents the data circuit-terminating equipment (DCE) as described by the ITU-T
V.24 Recommendation [4]. A customer application processor connected to the module through
one of the interfaces represents the data terminal equipment (DTE).
All the interfaces listed above are controlled and operated with:
Sprint required AT Commands
Verizon required AT Commands
AT commands according to 3GPP TS 27.010 [7]
AT commands according to
3GPP TS 27.005
[6]
AT commands according to
3GPP TS 27.010
u-blox AT commands
For the complete list of supported AT commands and their syntax refer to the u-blox C200 AT
Commands Manual [3].
The USB interface, using all the lines provided (VUSB_DET, USB_D+ and USB_D-), can be used for
firmware upgrade:
To directly enable PC (or similar) connection to the module for firmware upgrade, provide
direct access on the application board to the VUSB_DET, USB_D+ and USB_D- lines of the
module . Also provide access to the PWR_ON & HW_SHUTDOWN pins, or enable the DC
supply connected to the VCC pin to start the module firmware upgrade The following sub-
chapters describe serial interface configuration and provide a detailed description of each
interface for the application circuits.
40.4.1
Serial interfaces configuration
UART and USB serial interfaces are available as AT command interface and for Packet-Switched
Data communication. The serial interfaces are configured as described in Table 10 (for information
about further settings, please refer to the u-blox C200 AT Commands Manual [3]).
Note : The UART is 5 wire implementation therefore DTR, DSR, Data Carrier Detect and Data
Terminal Ready functions are not available.