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SARA-R410M-02B-01 Datasheet(PDF) 14 Page - u-blox AG |
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SARA-R410M-02B-01 Datasheet(HTML) 14 Page - u-blox AG |
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14 / 43 page  SARA-R4 series - Data sheet UBX-16024152 - R18 Interfaces Page 14 of 43 The USB_D+ / USB_D- lines carry the USB data and signaling, while the VUSB_DET pin represents the input to enable the USB interface by applying an external valid USB VBUS voltage (5.0 V typical). ☞ The USB interface is available as an AT command / data communication interface only if an external valid USB VBUS voltage (5.0 V typical) is applied at the VUSB_DET input of the module since the switch-on of the module, and then held during normal operations. In this case, the UART will not be available. ☞ If the USB interface is enabled, the module does not enter the low power deep sleep mode: the external USB VBUS voltage needs to be removed from the VUSB_DET input of the module to let it enter the Power Saving Mode defined in 3GPP Rel.13. SARA-R4 series modules provide by default a set of two USB functions: AT commands and data communication Diagnostic log For more details regarding USB configurations / capabilities, see the SARA-R4 series system integration manual [2]. 2.5.3 SPI interface ☞ The SPI interface is not supported by the “00”, “01”, “02”, “52”, “63” and “73” product versions. SARA-R4 series modules include a Serial Peripheral Interface for communications with compatible external device. The SPI interface can be made available as an alternative function, in a mutually exclusive way, over the digital audio interface pins (I2S_WA / SPI_MOSI, I2S_RXD / SPI_MISO, I2S_CLK / SPI_CLK, I2S_TXD / SPI_CS). 2.5.4 SDIO interface ☞ The SDIO interface is not supported by “00”, “01”, “02”, “52”, “63” and “73” product versions. SARA-R4 series modules include a 4-bit Secure Digital Input Output interface (SDIO_D0, SDIO_D1, SDIO_D2, SDIO_D3, SDIO_CLK, and SDIO_CMD) designed to communicate with external compatible SDIO devices. 2.5.5 DDC (I2C) interface ☞ The DDC (I2C) interface is not supported by the “00” and “01” product versions. SARA-R4 series modules include an I2C-bus compatible DDC interface (SDA, SCL) available to communicate with a u-blox GNSS receiver and with external I2C devices as for example an audio codec: the SARA-R4 series module acts as an I2C master that can communicate with I2C slaves in accordance with the I2C-bus specifications [12]. The SDA and SCL pins have internal pull-up to V_INT, so there is no need of additional pull-up resistors on the external application board. |
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