Motorola 8900 - Blackberry Curve Cell Phone OEM Car Charger, Developer'S Manual

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Serial Interfaces
22 C24 Module Hardware Description December 15, 2008
C24 is defined as a DCE device, and the user application is defined as the DTE device. These
definitions apply for the UART signals naming conventions, and the direction of data flow, as
described in
Figure 2-11 .
Figure 2-11: UART2 Interface Signals
The UART default port configuration is 8 data bits, 1 stop bit and no parity, with hardware flow
control and 115200 baud rate.
Important:
The UART2 interface can't be operated together with the UIM Card interface. Both
interfaces share the same internal HW port. Therefore, applications using the
UART2 interface must not connect any external devices to the UIM Card interface,
and vise versa.
USB Interface
C24 incorporates a standard Universal Serial Bus (USB) interface.
The C24 USB electrical interface and protocol conform to the USB 2.0 full-speed specifications.
C24 is defined as a USB device on the USB bus and does not support hub or host functionality.
The USB interface provides the following services:
•
Standard communications with C24, as done through the UART1 interface
•
FW programming
•
Data logging for application debug
•
Output of GPS location data in Binary and NMEA format
The USB interface signals are shown in Figure 2-12 .
Figure 2-12: USB Interface Signals