bc41b143a07 ETC-unknow, bc41b143a07 Datasheet - Page 62

• Manufacturer Part Number: bc41b143a07
• Description: Single Chip Bluetooth
• Manufacturer: ETC-unknow

Four signals are used to implement the UART function, as shown in Figure 9.8. When BlueCore4-ROM 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_USB.
UART configuration parameters, such as data rate and packet format, are set using BlueCore4-ROM software.
Note:
The UART interface is capable of resetting BlueCore4-ROM upon reception of a break signal. A break is identified by
a continuous logic low (0V) on the UART_RX terminal, as shown in Figure 9.9. If t
by PSKEY_HOST_IO_UART_RESET_TIMEOUT, (0x1a4), a reset will occur. This feature allows a host to initialise
the system to a known state. Also, BlueCore4-ROM can emit a break character that may be used to wake the host.
Note:
CS-101564-DSP12
Parameter
Data Rate
Flow Control
Parity
Number of Stop Bits
Bits per Channel
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.
The DFU boot loader must be loaded into the Flash device before the UART or USB interfaces can be used. This
initial flash programming can be done via the SPI.
Figure 9.8: Universal Asynchronous Receiver
Minimum
Maximum
Table 9.5: Possible UART Settings
Figure 9.9: Break Signal
Production Information
© CSR plc 2003-2007
UART_RTS
UART_CTS
UART_RX
UART_TX
BlueCore
1200 bits/s (≤2%Error)
9600 bits/s (≤1%Error)
BRK
3M bit/s (≤1%Error)
None, Odd or Even
RTS/CTS or None
Possible Values
is longer than the value, defined
1 or 2
8
Device Terminal Descriptions
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