User's Manual

Wi2Wi, Inc. Rev.1.1
Data Sheet, WLAN-Bluetooth Module– W2CBW009S
Dated: October 20, 2009
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 Wi2Wi, Inc.
Copyright © 2009 Wi2Wi, Inc.
Page 12 of 20
Note : The SDIO-SPI CS Signal timing is identical to all other SDIO inputs
Table 4: SDIO Timing Data
Symbol Parameter Condition Min Typ Max Units
Normal 0 -- 25 MHz
f pp Clock Frequency
High speed 0 -- 50 MHz
Normal 10 -- -- Ns
T WL Clock Low Time
High speed 7 -- -- Ns
Normal 10 -- -- Ns
T WH Clock High Time
High speed 7 -- -- Ns
Normal 5 -- -- Ns
T ISU Input Setup Time
High speed 6 -- --
Normal 5 -- -- Ns
T IH Input Hold Time
High speed 2 -- --
T ODLY Output Delay Time -- 0 -- 14 Ns
T OH Output Hold Time High speed 2.5 -- -- Ns
Note : Over full range of values specified in the Recommended Operating Conditions unless otherwise specified
5.3 G-SPI Interface
W2CBW009S supports a generic, half-duplex, DMA-assisted G-SPI host interface (G-SPI) that
allows a host controller using a Generic SPI bus protocol to access the WLAN device. The G-SPI
interface contains interface circuitry between an external G-SPI bus and the internal shared bus.
The 88W8688 acts as the device on the G-SPI bus. The host unit can access the G-SPI registers
directly and can access shared memory in the device through the use of BARs and a DMA engine.
The G-SPI unit supports Generic SPI Interface protocols as detailed in the following sections. The
design is capable of 50 MHz operation. The interface supports the following functionality: