Rainbow Electronics DAB-WLS-C01 (WiFi) - Manual (Page 12)

DSH_WISMC01_1v2 WISM 40 pin TCP-IP Data Sheet.doc © 2007 EZURiO Ltd
Page 12
The UART_DSR signal is an input to the module and is used to control the operation of the autorun
script. When the signal is de-asserted, the autorun script (if present) will be executed at power on. If
the UART_DSR signal is asserted then the autorun script is ignored.
The operation, meaning and direction of the UART_RI and UART_DCD signals is user programmable
under script control.
Note that the serial module output is at 3.0V CMOS logic levels. Level conversion must be added to
interface with an RS-232 level compliant interface.
7.1.2 GPIO Port
Twelve lines of programmable bi-directional input/outputs (I/O) are provided that can be accessed
either via the UART port or via the wireless link using UWscript functions. These can be used as data
inputs or to control external equipment.
Each of the GPIO pins can be independently configured to be either an Input or Output. A selection of
ports can be accessed synchronously.
Four of the lines (GPIO 10-13) are shared with modem control functions. If they are used to
implement a fully featured UART, then they cannot be used for GPIO.
7.1.3 ADC
The Wireless LAN module provides access to two 10-bit ADCs. These provide an input range of 0V to
3.0v.
Suitable external scaling and over-voltage protection should be incorporated in your design.
7.1.4 Bluetooth Coexistence
Three pins are provided to allow implementation of Bluetooth coexistence schemes, when the 802.11
module is collocated with a Bluetooth radio. These connect directly between the basebands of the two
radios to ensure minimum interference. Both 2-wire and 3-wire coexistence schemes can be
supported.
Coexistence requires that the Bluetooth radio meets at least version 1.2 of the Bluetooth standard and
supports Adaptive Frequency Hopping (AFH).