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BCM4339 Datasheet, PDF (76/183 Pages) Cypress Semiconductor – Single-Chip 5G WiFi IEEE 802.11ac MAC/Baseband/Radio with Integrated Bluetooth 4.1 and FM Receiver | |||
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BCM4339 Preliminary Data Sheet
Generic SPI Mode
Generic SPI Mode
In addition to the full SDIO mode, the BCM4339 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 27: Signal Connections to SDIO Host (gSPI Mode)
SCLK
DI
DO
SD Host
BCM4339
IRQ
CS
Broadcom®
November 17, 2014 ⢠4339-DS106-R
Page 75
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