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BCM43353 Data Sheet
Generic SPI Mode
Generic SPI Mode
In addition to the full SDIO mode, the BCM43353 includes the option of using the simplified generic SPI (gSPI)
interface/protocol. Characteristics of the gSPI mode include:
• Supports up to 48 MHz operation
• Supports fixed delays for responses and data from device
• Supports alignment to host gSPI frames (16 or 32 bits)
• Supports up to 2 KB frame size per transfer
• Supports little endian (default) and big endian configurations
• Supports configurable active edge for shifting
• Supports packet transfer through DMA for WLAN
gSPI mode is enabled using the strapping option pins strap_host_ifc_[3:1].
Figure 20: Signal Connections to SDIO Host (gSPI Mode)
SD Host
SCLK
DI
DO
BCM43353
IRQ
CS
Broadcom^®
November 14, 2014 • 43353-DS104-R
Page 61