SiModule
pin
In/Out Function
SPI_SDO OUT SPI data from WLAN module to Host.
Master in Slave out, MISO. Clocked out on the rising or
falling edge of the clock (sw configurable in the initial
command).
SPI_CLK IN SPI clock supplied from Host.
Idle state of the clock is Low.
SPI_CSx IN SPI Chip select from Host. Active low
WLAN-BT COMMS
BT_RF_AC
TIVE
IN Indicates BT activity to the WLAN PTA (Packet Traffic
Arbitration).
Asserted high for a BT transaction and remains active
for the duration of the transaction.
BT_PRIORI
TY
IN Indicates Status of BT activity to WLAN PTA.
BT_FREQ IN BT priority indication signal.
Not used for Size 4.0 implementation.
BT_TX_CO
NFx
OUT WLAN PTA decision signal to BT.
CONTROL
PMEN IN WLAN Enable signal from Host.
WLAN_IR
Q
OUT Host wake-up request from WLAN Module. Active High
CLK_REQ OUT Clock request from WLAN module. Active High.
CLOCKING
SLEEP_CLK IN Cellular engine 32.768KHz Sleep Clock
Input capacitance is 7Pf max.
CLK IN System clock for WLAN Module. Typically 38.4MHz
from external Tcxo.
RF
ANT OUT Antenna input from product specific physical ISM
antenna.
BT_RF IN RF feed to Bluetooth
POWER
VIO Power Cellular engine IO supply
VBAT Power Battery supply from Phone.
VSS Power Ground Plane
RM-356
System Module and User Interface
Page 6 –20 COMPANY CONFIDENTIAL Issue 1
Copyright © 2008 Nokia. All rights reserved.
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