Gpio Information; Gpio_Pxx - Cypress WICED CYW920706WCDEVAL Hardware User's Manual

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8 GPIO Information

The Cypress WICED Studio API provides configuration support for up to 40 multiplexed GPIOs (represented as

WICED_GPIO_P0 through WICED_GPIO_P39). CYW20706 uses 23 of these multiplexed GPIOs. The assignment of the

multiplexed GPIOs to physical device pins is restricted from certain digital I/O pins when certain interfaces or signal functional

are used.

Table 8-1

shows CYW20706 interfaces and signal functions that, if used in a design, will restrict the set of digital I/O pins

available for assigning GPIOs.

If This Interface or Signal Function Is Used

S/PCM

BT_CLK_REQ

BT_DEV_WAKE

BT_HOST_WAKE

LPO_IN

These signal functions can be used to wake CYW20706 from sleep modes by an external MCU and for CYW20706 to wake

an external MCU. Embedded applications have better options for sleep and wake operations rather than using a dedicated

digital I/O pin, see

Unused GPIOs will be HI-Z (I/O disabled) after application initialization.

CYW920706WCDEVAL Hardware User Guide

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Table 8-1. Key Interface (or Signal Function) Pin Assignments

Appendix A "Power-Save

Options".

Then These Pins Cannot Be Used for GPIO_Pxx Assignments

A8, B7, C7, and C8

Doc. No.: 002-16535 Rev. **

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