BCM43907 Preliminary Data Sheet
SDIO 3.0
SDIO 3.0
SDIO 3.0—Device Mode
Description
The BCM43907 WLAN section supports SDIO version 3.0, including the new UHS-I modes:
•
•
•
•
DS: Default speed (DS) up to 25 MHz, including 1- and 4-bit modes (3.3V signaling).
HS: High-speed up to 50 MHz (3.3V signaling).
SDR12: SDR up to 25 MHz (1.8V signaling).
SDR25: SDR up to 50 MHz (1.8V signaling).
Note: The BCM43907 is backward compatible with SDIO v2.0 host interfaces.
The following three functions are supported:
•
•
Function 0 Standard SDIO function (max. BlockSize/ByteCount = 32B)
Function 1 Backplane Function to access the internal SoC address space
(max. BlockSize/ByteCount = 64B)
•
Function 2 WLAN Function for efficient WLAN packet transfer through DMA
(max. BlockSize/ByteCount = 512B)
Broadcom®
March 12, 2016 • 43907-DS104-R
Page 34
BROADCOM CONFIDENTIAL
CYPRESS [ CYPRESS ]
