User Manual

Red

pine Signals, Inc. Proprietary and confidential Page 18

RS91

802.11bgn

WLAN

Module

Data Sheet

Version

1.48

Pin No. Pin Name Pin Type Description

56)

ND Ground Ground

57)

F_OUT Rfin/Rfout Antenna Port-50 ohms Impedance

58)

ND Ground Ground

tes:

• Some interfaces are not used in the default configuration or mode of

operation. These include the I2C, GPIO, and UART interfaces. These may

be used in custom applications with appropriate firmware. These are all

fundamentally Inout signals and may be configured either as input or

output.

• JTAG functionality is not included in default firmware.

• The Bluetooth coexistence interface (BT_PRIORITY, WLAN_ACTIVE,

BT_ACTIVE) are also general purpose I/O signals and may be

reprogrammed to be inputs or outputs as needed. Please refer to BT

coexistence application note for more details.

• Sleep clock input:

This should be a 32 kHz clock and is used in power-save modes, if

chosen. During the low power sleep state, the module's wake-up

timer uses the sleep clock - which can have one of three sources

i) an internal 32 kHz oscillator

This is the recommended mode of operation.

ii) a 32 kHz clock fed into this pin,

iii) a 32 kHz crystal connected to pins SLEEP_CLK_X2 and

SLEEP_CLK_X1.

NOTE: The recommended mode of operation is i).

This is a firmware configured GPIO pin and where not used, should be

left open.

By default, an internal 32KHz oscillator is used.

• Please refer to the Module Integration Guide document for reference

schematics and the list of recommended part numbers.

• Please contact Redpine for application notes or for customization of a

solution.