SWRA779 September   2023 CC3300 , CC3301

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Main Features
    1. 2.1 Dual Host Interface
    2. 2.2 Shared Host Interface
    3. 2.3 Autonomous Mode
    4. 2.4 Host Interrupt
      1. 2.4.1 Out-of-Band Interrupt
      2. 2.4.2 In-Band Interrupt
  6. 3Interfaces
    1. 3.1 Introduction
    2. 3.2 SDIO Interface
      1. 3.2.1 SDIO Overview
      2. 3.2.2 SDIO Flow Control
    3. 3.3 SPI Interface
      1. 3.3.1 SPI Overview
      2. 3.3.2 SPI Configuration
      3. 3.3.3 SPI Flow Control
    4. 3.4 Uart Interface
      1. 3.4.1 UART Overview
      2. 3.4.2 UART Configuration
      3. 3.4.3 UART Flow Control
    5. 3.5 Pin Count Options
  7. 4Host Communication
    1. 4.1 Protocol Overview
    2. 4.2 SDIO Wrapper
    3. 4.3 SPI Wrapper
  8. 5Boot Flow
    1. 5.1 SDIO
    2. 5.2 SPI

2.2 Shared Host Interface

In shared host interface, Wi-Fi and Bluetooth Low Energy share the same interface which may be either SDIO or SPI (the same hardware lines are used). The main advantage of using a shared interface is reduction in hardware pins that may be used for other purposes. If SDIO interface is used, up to six lines are used and if SPI interface is used, four lines are used. The calculation does not consider the extra interrupt lines. The full table with all pin count option is listed in Table 3-10.

Section 2.2 illustrates the dual host interface setup.

GUID-20230522-SS0I-BZH9-MPNG-RWQ84WTM0RJT-low.png Figure 2-2 CC33xx Shared Interface