BCM4339XKWBGT Datasheet, PDF (75/183 Pages) Cypress Semiconductor – Single-Chip 5G WiFi IEEE 802.11ac MAC/Baseband/Radio with Integrated Bluetooth 4.1 and FM Receiver

BCM4339 Preliminary Data Sheet
Figure 25: Signal Connections to SDIO Host (SD 4-Bit Mode)
CLK
SD Host
CMD
DAT[3:0]
BCM4339
SDIO v3.0
Figure 26: Signal Connections to SDIO Host (SD 1-Bit Mode)
CLK
CMD
SD Host
DATA
IRQ
BCM4339
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^®
November 17, 2014 • 4339-DS106-R
Page 74