User's Manual

FLC-WFM301 Datasheet
Flaircomm Microelectronics Confidential
-14-
4.3 RF Interface
The module integrates a band-pass filter to the antenna port which is a 50  port. The user can
connect a 50  antenna directly to the antenna port (pin 48).
4.4 General Purpose Digital IO
There are nine general purpose digital IOs defined in the module. All these GPIOs can be configured
by software to realize various functions, such as button controls, LED displays or interrupt signals to
host controller, etc. Do not connect them if not use.
GPIO pin
Function Assignment
GPIO[1]
BT-Coexistence or other (1.8V)
GPIO[2]
BT-Coexistence or other (1.8V)
GPIO[3]
BT-Coexistence or other (1.8V)
GPIO[4]
BT-Coexistence or other (1.8V)
GPIO[5]
BT-Coexistence or other (1.8V)
GPIO[9]
GPIO (3.3V)
GPIO[10]
GPIO (3.3V)
GPIO[11]
GPIO (3.3V)
Table 3: GPIO Usage
4.5 Analog IO
AIO Pin
Assignment
AIO[0]
Analog IO (3.3V)
AIO[2]
Analog IO (3.3V)
Table 4: Analog IO Usage
4.6 Host Interfaces
WFM301CL has a single host interface port that can be configured into one of four modes:
 SD 1-bit
 SD 4-bit
 SDIO SPI
 CSPI
The first three modes operate according to the SD Card specifications. The fourth mode is a CSR
proprietary variant designed to allow more efficient implementation on hosts without dedicated
SDIO host controller. Table 5 shows the usage of the host interfaces pins in each mode.
Pin Name
SD 1-bit
SD 4-bit
SD SPI
CSPI
SD_CLK
CLK: Clock
CLK: Clock
SCLK: Clock
CLK: Clock
SD_CMD
CMD: Commend line
CMD: Command line
DI: Data input
MOSI: Data input