Rainbow Electronics DAB-WLS-C21 (BlueTooth) - Manual (Page 5)

www.EZURiO.com
DSH_BTM402_0v9 BISM2 PA Data Sheet.DOC © 2007 EZURiO Ltd 5
3.2 Pin Descriptions
The Hirose DF12C board-to-board connector on the module is a 40-pin double-row receptacle.
The table below defines the pin functions. Note that this pin-out is as viewed from the underside of
the Module.
Pin
No.
Signal Description Pin
No.
Signal Description
1 Analogue 0 1.8v Max 2 N/C Do not connect ***
3 Analogue 1 1.8v Max 4 N/C Do not connect ***
5 SPI_MISO SPI bus serial O/P 6 UART_RI ‘Ring’ Input or Output
7 SPI_CSB SPI bus chip select I/P 8 UART_DCD Input or Output
9 SPI_CLK SPI bus clock I/P 10 UART_DSR Input
11 GND 12 GPIO3/UART_DTR I/O for Host
13 RESET Reset I/P * 14 GPIO4 I/O for Host
15 GND 16 GPIO5 I/O for Host
17 SPI_MOSI SPI bus serial I/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 Monitor 28 N/C
29 VCC_5V 3.6V < VIN < 5.0V 30 GND
31 N/C 32 USB / RESERVED Do not connect
33 GPIO6 ** I/O for Host 34 USB / RESERVED Do not connect
35 GPIO7 ** I/O for Host 36 GND
37 GPIO8 ** I/O for Host 38 GND
39 GPIO9 I/O for Host 40 N/C
Notes:
* The reset circuitry within the BISM Serial Modules now incorporates a brown-out detector within
the module. Customers migrating from previous modules should check their implementation, as they
may be able to simplify their external power supply design. The reset line has a fixed 10kOhm pull
down resistor to ground.
** Pins 33, 35 and 37 were N/C on BISM1. Pin 39 was a 1V8 monitor. Designers migrating between
designs should be aware that these are now available as I/O. Default configuration is as an input.
*** Pins 2 and 4 were used as GPIO in previous versions of the BISM and WISM. These signals are
used internally for PA control. These pins MUST NOT BE CONNECTED.
PIO lines can be configured through software to be either inputs or outputs with weak or strong pull-
ups or pull-downs. At reset, all PIO lines are configured as inputs with weak pull-downs.
UART_RX, UART_TX, UART_CTS, UART_RTS, UART_RI, UART_DCD and 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.