Product Info

Bluetooth Serial Module

AT Command Set

Date : 3 Feb 03 Issue No : 1.9 Doc No : XRBLU020-001SW-0 Page 24 of 38

8. Pin Out

The TDK Bluetooth Serial Module is physically accessed via a 40 way mini-pci connector. The pin

allocation is as follows:-

PinNo Signal Description PinNo Signal Description

1 RESERVED Do Not Connect 2 GPIO1 I/O for Host.

3 RESERVED Do Not Connect 4 GPIO2 I/O for Host

5 SPI_MOSI SPI bus serial in I/P 6 UART_RI Output

7 SPI_CSB SPI bus chip select I/P 8 UART_DCD Output

9 SPI_CLK SPI bus clock I/P 10 UART_DSR Input

11 GND 12 GPIO3 I/O for Host

13 RESET Reset I/P 14 GPIO4 I/O for Host (Right LED)

15 GND 16 GPIO5 I/O for Host (Left LED)

17 SPI_MISO SPI bus serial out O/P 18 GND

19 UART_CTS Clear to Send I/P 20 PCM_CLK PCM Clock I/P

21 UART_TX Transmit Data O/P 22 PCM_IN PCM Data I/P

23 UART_RTS Request to Send O/P 24 PCM_SYNC PCM Sync I/P

25 UART_RX Receive Data I/P 26 PCM_OUT PCM Data O/P

27 VCC_3V3 3.3V Output 28 N/C

29 USB_5V 3.6V < VIN < 6.0V 30 GND

31 N/C 32 RESERVED Do Not Connect

33 N/C 34 RESERVED Do Not Connect

35 GND 36 GND

37 N/C 38 GND

39 VCC_1V8 1.8V Output 40 N/C

Notes:

• UART_RX,UART_TX,UART_CTS,UART_RTS,UART_RI,UART_DCD,UART_DSR are all 3.3v

level logic. For example, when RX and TX are idle they will be sitting at 3.3V. Conversely for

handshaking pins CTS,RTS,RI,DCD,DSR a 0v is treated as an assertion.

• Pin 6 (UART_RI) has inverse logic. It is normally 3.3v. When a remote device initiates a

connection, this pin goes low. This means that when this pin is converted to RS232 voltage levels

it will have the correct voltage level for assertion.

• Pin 8 (UART_DCD) has inverse logic. It is normally 3.3v. When a connection is live this pin is low.

This means that when this pin is converted to RS232 voltage levels it will have the correct voltage

level for assertion.

• Pin 10 (UART_DSR) is an input, again with inverse logic. It should be connected to the DTR

output of the host. When the serial module is in high speed mode (See definition for S reg 512),

this pin should be asserted by the host to ensure that the connection is maintained. A deassertion

is taken to mean that the connection should be dropped, or an online command mode is being

requested.

• The GPIOn pins can be accessed using S Registers 621 to 625

• GPIO4 and GPIO5 are also connected to LEDs on the module. If these i/o pins are set for input,

then the LED will be driven by the host and appropriate drive current requirements must be

satisfied. By default GPIO4 is used to drive the right led which indicates connection status.