BCM88335 datasheet(57/140 Pages) CYPRESS

Part #	BCM88335

Description	Single-Chip 5G Wi-Fi IEEE 802.11ac MAC/Baseband/ Radio with Integrated Bluetooth 4.1 for Automotive Applications

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Manufacturer	CYPRESS [Cypress Semiconductor]

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WLAN Host Interfaces

BCM88335 Data Sheet

BROADCOM CONFIDENTIAL

Broadcom®

September 23, 2015 • 88335-DS100-R

Page 56

Section 9: WLAN Host Interfaces

SDIO v3.0

The BCM88335 WLAN section supports SDIO version 3.0, including the new UHS-I modes:

• DS: Default speed (DS) up to 25 MHz, including 1- and 4-bit modes (3.3V signaling).

• HS: High speed up to 50 MHz (3.3V signaling).

• SDR12: SDR up to 25 MHz (1.8V signaling).

• SDR25: SDR up to 50 MHz (1.8V signaling).

• SDR50: SDR up to 100 MHz (1.8V signaling).

• SDR104: SDR up to 208 MHz (1.8V signaling).

• DDR50: DDR up to 50 MHz (1.8V signaling).

The SDIO interface also has the ability to map the interrupt signal on to a GPIO pin for applications requiring an

interrupt different from the one provided by the SDIO interface. The ability to force control of the gated clocks

from within the device is also provided. SDIO mode is enabled by strapping options. Refer to Table 16 WLAN

GPIO Functions and Strapping Options.

The following three functions are supported:

• Function 0 Standard SDIO function (Max. BlockSize/ByteCount = 32B)

• Function 1 Backplane Function to access the internal system-on-chip (SoC) address space

(Max. BlockSize/ByteCount = 64B)

• Function 2 WLAN Function for efficient WLAN packet transfer through DMA

(Max. BlockSize/ByteCount = 512B)

SDIO Pins

Note: The BCM88335 is backward compatible with SDIO v2.0 host interfaces.

Table 12: SDIO Pin Description

SD 4-Bit Mode

SD 1-Bit Mode

gSPI Mode

DATA0

Data line 0

DATA

Data line

DO

Data output

DATA1

Data line 1 or Interrupt IRQ

Interrupt

IRQ

Interrupt

DATA2

Data line 2 or Read Wait RW

Read Wait

NC

Not used

DATA3

Data line 3

N/C

Not used

CS

Card select

CLK

Clock

CLK

Clock

SCLK Clock

CMD

Command line

CMD

Command line

DI

Data input

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