SWRU437B September   2015  – June 2020 WL1801MOD , WL1805MOD , WL1807MOD , WL1831MOD , WL1835MOD , WL1837MOD

 

  1.   WiLink Module Hardware Integration Guide
    1.     Trademarks
    2. 1  Module Variant Table
      1. 1.1 WiLink WLAN Antenna Configuration
        1. 1.1.1 Single-Input Single-Output (SISO)
        2. 1.1.2 Multiple-Input Multiple-Output (MIMO)/Maximum Ratio Combining (MRC)
    3. 2  Critical Connections
    4. 3  Power Supply
      1. 3.1 Power Up/Shutdown Sequence
        1. 3.1.1 Power Up
        2. 3.1.2 Shutdown
      2. 3.2 Power Sequencing
    5. 4  Clocks
      1. 4.1 Slow Clock
      2. 4.2 Fast Clock
    6. 5  Current Consumption
      1. 5.1 Performance Parameters - Typical
    7. 6  Antenna
    8. 7  Ground Connections
    9. 8  Layout
    10. 9  Hardware Troubleshoot
      1. 9.1 System Requirements
      2. 9.2 Power Rails
      3. 9.3 Critcal Supplies
      4. 9.4 Sense on Reset
      5. 9.5 WLAN
        1. 9.5.1 WLAN Host Interface (SDIO)
        2. 9.5.2 WLAN IRQ Operation (SDIO Out-of-Band Interrupt)
      6. 9.6 Bluetooth and Bluetooth Low Energy
        1. 9.6.1 Bluetooth UART HCI Interface
        2. 9.6.2 Bluetooth PCM
      7. 9.7 Reserved Pins
      8. 9.8 Debug
    11. 10 WiFi_Zigbee Coex
    12. 11 References
  2.   Revision History

9.8 Debug

Table 10. Debug/RS232 Interface Lines

Pin Number Name Type Description
26 WLAN RS232 RX I WLAN debug interface
27 WLAN RS232 TX O WLAN debug interface
42 WL_UART_DBG O WLAN FW logger
43 BT_UART_DBG O BT FW logger

For bring up and evaluation of the module, the following should be connected:

  • Pin out GPIO1 and GPIO2 for WLAN RS232 interface to enable RTTT tool for controlling RF test in the absence of a host.
  • There is a need to pull up WL_IRQ (10k pull up) at power-on to enable this RS232 UART interface.
  • WLAN logger must have at least a TP to allow Wi-Fi Firmware logs to be captured by gLogger. Requires a 1.8 V LVCMOS to USB cable for capture.
  • Bluetooth logger must have at least a TP to allow Bluetooth Firmware logs to be captured by gLogger. Requires a 1.8 V LVCMOS to USB cable for capture.
  • WLAN RS232 lines - Check transmission on Rx/Tx line, for every packet on Rx should be a response in Tx.