BC41B143A-DS-002PD Datasheet, PDF (60/89 Pages) List of Unclassifed Manufacturers – BlueCore 4-ROM CSP EDR Single Chip Bluetooth v2.0 + EDR System

Device Terminal Descriptions
11.4 UART Interface
BlueCore4-ROM CSP UART interface provides a simple mechanism for communicating with other serial devices
using the RS232 standard ⁽¹⁾.
Four signals are used to implement the UART function:
! UART_TX
! UART_RX
! UART_RTS
! UART_CTS
When BlueCore4-ROM CSP 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. That is, low means data can be sent. 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 BlueCore4-ROM CSP PS
keys.
Notes:
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)}
Baud Rate
Flow Control
Parity
Number of Stop Bits
Bits per channel
Parameter
Possible Values
Minimum
Maximum
1200 Baud (≤2%Error)
9600 Baud (≤1%Error)
3MBaud (≤1%Error)
RTS/CTS or None
None, Odd or Even
1 or 2
8
Table 11.5: Possible UART Settings
BC41B143A-ds-002Pd
This material is subject to CSR’s non-disclosure agreement
Production Information
© Cambridge Silicon Radio Limited 2005
Page 60 of 89