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shutdown RFX2411N PA/LNA module

Hi,

I am using nRF52832 with S132_V2.0.0 and SDK_11.0.0. In my application i plan to use RFX2411N PA/LNA module. In datasheet of RFX2411N, I found that it can be used in following four mode.

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Using sd_ble_opt_set(BLE_COMMON_OPT_PA_LNA, &opt), my application can control TX mode and RX mode automatically. It can also control Bypass mode by MODE pin but How can it control shutdown mode? Beacuse It needs TXEN and RXEN pin low but after calling sd_ble_opt_set, I am not able to set it low. So how can i control this two pin as a GPIO?

I have tried to uninitialize PPI and GPIOTE module but it gives me error.

Thanks, Bipin Patel

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  • I am not 100% sure but i think that when bypass is activated, TXEN/RXEN are like disconnected, so no there is no current flow. So you don't have to worry about that the pin levels are changing... there is only current eaten by module anyway - to save current you have to physically disconnect it from nRF (so like shutdown, you disconnect your antenna). according to datasheet, it is about 0.6mA. And driving/not driving RXEN/TXEN have no influcence on that...

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  • I am not 100% sure but i think that when bypass is activated, TXEN/RXEN are like disconnected, so no there is no current flow. So you don't have to worry about that the pin levels are changing... there is only current eaten by module anyway - to save current you have to physically disconnect it from nRF (so like shutdown, you disconnect your antenna). according to datasheet, it is about 0.6mA. And driving/not driving RXEN/TXEN have no influcence on that...

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