User's Manual

apmcomm confidential
apm6658/6659 WiFi 802.11 b/g/n & BT2.1+EDR Dual Radio Module
Product Information Data Sheet
Page 12 of 30
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apmcomm Proprietary and Confidential – Product information is subject to change without notice.– May 30 2011
SD-SPI Name Pin #
Pin Name Description
IRQ 27 WL_SD_DAT[1]
Interrupt
DO 29 WL_SD_DAT[0]
Data output
DI 28 WL_SD_CMD
Data input
SCLK 25 WL_SD_CLK
Clock
VDDIO 23 WL_VSDIO Serial I/O VDD
1-4-3 Debug SPI Pins
apm6658/6659 has a SPI interface for test and debugging purposes. The lab tools, such as UniTest and UniPSUtil,
can communicate with apm6658/6659 WiFi part using the SPI protocol over a connection to an LPT port.
Debug SPI Name Pin #
Pin Name Description
MISO 3 WL_SPI_MISO
Debug SPI data output
MOSI 5 WL_SPI_MOSI
Debug SPI data input
CLK 4 WL_SPI_CLK
Debug SPI clock
CSn 6 WL_SPI_CSn
Debug SPI chip select, active low
VDDIO 47 WL_VPADS_0_7 Serial I/O VDD
1-4-4 PIO Pins
The PIO pins are used to implement user defined input and output signals to and from the module such as external
interrupts, LED controlled outputs, and other user-defined I/Os. Each PIO can be independently controlled.
z WL_PIO[11:10]: LED WLAN link activities.
z WL_PIO[12]: Host wakeup.
z WL_PIO[9]: WiFi External clock request out
z Other PIOs: Reserved
1-4-5 WP Pin
WL_WP is write protection for internal EEPROM. The internal EEPROM stores calibration table, MAC address,
etc. for WiFi part. When the pin is pulled high, it protects the EEPROM content. If tied to VSS, normal memory
read/write operation is enabled.