BC352239A Datasheet, PDF (63/116 Pages) List of Unclassifed Manufacturers – BlueCore 3-Multimedia External

Device Terminal Descriptions
8.5 UART Interface
BlueCore3-Multimedia External Universal Asynchronous Receiver Transmitter (UART) interface provides a
simple mechanism for communicating with other serial devices using the RS232 protocol⁽¹⁾.
BlueCore3-Multimedia External
UART_TX
UART_RX
UART_RTS
UART_CTS
Figure 8.20: Universal Asynchronous Receiver
Four signals are used to implement the UART function, as shown in Figure 8.. When
BlueCore3-Multimedia External is connected to another digital device, UART_RX and UART_TX transfer data
between the two devices. The remaining two signals, UART_CTS and UART_RTS, can be used to implement
RS232 hardware flow control where both are active low indicators. All UART connections are implemented using
CMOS technology and have signalling levels of 0V and VDD_PADS.
UART configuration parameters, such as Baud rate and packet format, are set using
BlueCore3-Multimedia External software.
Notes:
In order to communicate with the UART at its maximum data rate using a standard PC, an accelerated serial
port adapter card is required for the PC.
(1) _{Uses RS232 protocol but voltage levels are 0V to VDD_USB, (requires external RS232 transceiver}
chip).
Parameter
Possible Values
Baud Rate
Flow Control
Parity
Number of Stop Bits
Bits per channel
Minimum
Maximum
1200 Baud (≤2%Error)
9600 Baud (≤1%Error)
1.5MBaud (≤1%Error)
RTS/CTS or None
None, Odd or Even
1 or 2
8
Table 8.16: Possible UART Settings
BC352239A-ds-001Pc
© Cambridge Silicon Radio Limited 2004
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