# Reset and
strapping pin

Source: [https://docs.qualcomm.com/doc/80-WL740-8/topic/reset_and_strapping_pin.html](https://docs.qualcomm.com/doc/80-WL740-8/topic/reset_and_strapping_pin.html)

At each start-up or reset, QCC74x requires some initial configuration
      parameters, such as in which boot mode to load QCC74x, etc. These parameters
      are passed over via the strapping pins.

GPIO2 and CHIP\_EN control the boot mode
after the reset is released.

Table : Boot mode control

| GPIO2 | CHIP\_EN | Boot mode |
| --- | --- | --- |
| 1 | 0-&gt;1 | Joint download boot (Boot from UART(GPIO21/22)/SDU) |
| 0 | 0-&gt;1 | SPI boot |

In SPI boot mode, the ROM boot loader loads and executes the program from SPI Flash to boot
      the system.

In joint download boot mode, customers can download binary files into Flash using the UART,
      or SDU interface. It is also possible to download binary files into SRAM and execute it from
      SRAM.

In actual design, recommend connecting a 33K pull-down resistor
to this pin.

The QCC74x is reset when the CHIP\_EN pin is pulled to low. Recommend to add
      an RC delay circuit to the CHIP\_EN pin, and the recommended delay is 3.3 ms.

Table : Schematic for the reset and strapping pin

| QCC743 | ![](data:image/png;base64,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) |
| --- | --- |
| QCC744/QCC748 | ![](data:image/png;base64,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) |

Last Published: Apr 08, 2025

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