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BCM4354KKWBGT Datasheet, PDF (71/192 Pages) Cypress Semiconductor – Single-Chip 5G Wi-Fi IEEE 802.11ac 2×2 MAC/ Baseband/Radio with Integrated Bluetooth 4.1 and FM Receiver | |||
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BCM4354 Data Sheet
Figure 26: Signal Connections to SDIO Host (SD 4-Bit Mode)
SD Host
CLK
CMD
DAT[3:0]
BCM4354
HSIC Interface
Figure 27: Signal Connections to SDIO Host (SD 1-Bit Mode)
SD Host
CLK
CMD
DATA
IRQ
RW
BCM4354
Note: Per Section 6 of the SDIO specification, pull-ups in the 10 k⦠to 100 k⦠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 hostâs internal
pull-ups.
HSIC Interface
As an alternative to SDIO, an HSIC host interface can be enabled using the strapping option pins
strap_host_ifc_[3:1]. HSIC is a simplified derivative of the USB2.0 interface designed to replace a standard USB
PHY and cable for short distances (up to 10 cm) on board point-to-point connections. Using two signals, a
bidirectional data strobe (STROBE) and a bidirectional DDR data signal (DATA), it provides high-speed serial
480 Mbps data transfers that are 100% host driver compatible with traditional USB 2.0 cable-connected
topologies.
Broadcom®
October 15, 2014 ⢠4354-DS109-R
BROADCOM CONFIDENTIAL
Page 70
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