SWRA779 September   2023 CC3300 , CC3301 , CC3301MOD , CC3351MOD

 

  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

3.4.1 UART Overview

Table 3-7 lists the characteristics of the UART host interface.

Table 3-7 UART Interface Characteristics
Characteristics Description
UART version 4-wire (H4)
Max baud rate 3Mbaud
Flow control Hardware (RTS/CTS)
Automatic baud rate detection No
I/O voltage levels 1.8 V

Table 3-8 lists the signals of the UART host interface.

Table 3-8 UART Interface Signals
Signal Name Source Description
TxD Peripheral Serial out
RxD Controller Serial in
RTS (Request to Send) Peripheral Request-to-Send to signal the host controller to stop/resume transmission
CTS (Clear to Send) Controller Clear-to-Send to signal the peripheral to stop/resume transmission