User's Manual

Doc No.
Rev
1.0
Document released Date.
15/8/25
Page
14
Description
WM-BN-BM-26_A User Manual
Pin# Pin Name Type Description
H1~H9 GND - Ground
Host interface SDIO/gSPI mode selection
6
SDIO/gSPI function
PIN number 8
、
10
、
11
、
12
、
13 and 14 as SDIO/SPI interface. The WM-BN-BM-26_A
WLAN section supports SDIO version 2.0 for both 1-bit(25Mbps) and 4-bit modes
(100Mbps), as well as high speed 4-bit mode (25MHz clocks – 200Mbps). It has the
ability to map the interrupt signal on a GPIO pin.
Besides, WM-BN-BM-26_A also provide gSPI interface, please see the WLAN GPIO
signals and strapping options.
The default setting is SDIO interface and WL_SDIO_D2 needs to pull high
.
SDIO Pins Status Description
4 bit mode
Pin# Symbol I/O Description
8 SDIO_CLK I SDIO Input Clock from Host (up to 50 MHz), external loader
capacitor is optional
11 SDIO_CMD I/O SDIO Command Line, external pull-up resistor needed(10-100K
ohm)
The content of this document is to be treated as strictly confidential and is not to be disclosed, reproduced or used, except as
authorized in writing by Universal Scientific Industrial Co., Ltd. Copyright © 2011 Universal Scientific Industrial Co. ,Ltd.
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