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docs(system): update GPIO wakeup section for clarity on EXT0 and EXT1 support

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wuzhenghui
2026-06-03 17:30:26 +08:00
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examples/system/deep_sleep/README.md
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@@ -11,7 +11,7 @@ The following wake up sources are demonstrated in this example (refer to the [Wa
- **Timer:** An RTC timer that can be programmed to trigger a wake up after a preset time. This example will trigger a wake up every 20 seconds.
- **EXT0:** External wake up 0 can trigger wakeup when one predefined RTC GPIO is at a predefined logic level. This example uses GPIO25 in ESP32 or GPIO3 in ESP32-S2/S3 to trigger a wake up when the pin is HIGH. (This wake up source is only available on ESP32, ESP32-S2, and ESP32-S3.)
- **EXT1:** External wake up 1 which is tied to multiple RTC GPIOs. This example uses GPIO2 and GPIO4 to trigger a wake up with any one of the two pins are HIGH. (This wake up source is available on ESP32, ESP32-S2, ESP32-S3, ESP32-C6 and ESP32-H2.)
- **EXT1:** External wake up 1 which is tied to multiple RTC GPIOs. This example uses GPIO2 and GPIO4 to trigger a wake up with any one of the two pins are HIGH. (Available on targets that define `SOC_PM_SUPPORT_EXT1_WAKEUP`, pin set depends on the chip—see the programming guide and datasheet.)
- **GPIO:** Pads powered by VDD3P3_RTC can be used to trigger a wake up from deep sleep. You may choose the pin and trigger level in menuconfig. (This wake up source is unavailable on ESP32, ESP32-S2, ESP32-S3 and ESP32-H2.)
- **Touch:** Touch pad sensor interrupt. This example uses touch pads connected to GPIO32, GPIO33 in ESP32 or GPIO9 in ESP32-S2/S3 to trigger a wake up when any of the pads are pressed.