User's Manual

apmcomm confidential
apm6658/6659 WiFi 802.11 b/g/n & BT2.1+EDR Dual Radio Module
Product Information Data Sheet
Page 13 of 30
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apmcomm Proprietary and Confidential – Product information is subject to change without notice.– May 30 2011
The WiFi firmware does not incorporate any support for writing to the EEPROM during normal operation. This
significantly reduces the risk of spurious writes corrupting the contents of the EEPROM, and means it is not possible
to repair any damage that may occur. Hence, it is suggested that keep the pin, WL_WP, permanently pulled high to
minimize the risk of data corruption.
1-4-6 Power Pins
The following list shows the pins referenced to WL_VSDIO.
Pin # Pin name Pin # Pin name Pin # Pin name
24
WL_SD_DAT[2]
25
WL_SD_CLK
26
WL_SD_DAT[3]
27
WL_SD_DAT[1]
28
WL_SD_CMD
29
WL_SD_DAT[0]
The following list shows the pins referenced to WL_VDD_PADS_0_7.
Pin #
Pin name
Pin #
Pin name
Pin #
Pin name
3 WL_SPI_MISO 4 WL_SPI_CLK 5 WL_SPI_MOSI
6 WL_SPI_CSn 30 WL_RESETn
The following list shows the pins referenced to WL_3V3.
Pin # Pin name Pin # Pin name Pin # Pin name
9 WL_PIO[9] 33 WL_PIO[10] 34 WL_PIO[11]
31 WL_PIO[12]
*WL_VDD_PADS_0_7 voltage power level must be the same as BT_VDD_PADS and the oscillator.
1-5 Bluetooth Pins
1-5-1 Host Selection
The apm6658/6659 selects the UART interface by reading BT_PIO[4] at boot-time. When BT_PIO[4] is low, the
UART is enabled.