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

2.1 Dual Host Interface

Dual host interface is the most common configuration where each IP uses its own interface. Wi-Fi may either use SDIO or SPI (the same hardware lines are used) and Bluetooth Low Energy uses UART lines. The dual interface mode is the most wasteful in terms of hardware pins. If SDIO interface is used for Wi-Fi, up to 10 lines are used, 6 for SDIO and 4 for UART. If SPI interface is used for Wi-Fi, up to 8 lines are used, 4 for SPI and 4 for UART. The calculation does not consider the extra interrupt lines. The full table with all pin count option is listed in Table 3-10.

Figure 2-1 illustrates the dual host interface setup.
GUID-20230522-SS0I-MM0B-4PBK-PL0BSVXQFFFC-low.png Figure 2-1 CC33xx Dual Interface