BCM88335 Data Sheet
SDIO v3.0
Figure 18: Signal Connections to SDIO Host (SD 4-Bit Mode)
CLK
CMD
SD Host
BCM88335
DAT[3:0]
Figure 19: Signal Connections to SDIO Host (SD 1-Bit Mode)
CLK
CMD
DATA
BCM88335
SD Host
IRQ
RW
Note: Per Section 6 of the SDIO specification, pull-ups in the 10 kΩ to 100 kΩ range are required on
the four DATA lines and the CMD line. This requirement must be met during all operating states either
through the use of external pull-up resistors or through proper programming of the SDIO host’s internal
pull-ups.
Broadcom®
September 23, 2015 • 88335-DS100-R
Page 57
BROADCOM CONFIDENTIAL
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