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SARA-R5 Datasheet(PDF) 16 Page - u-blox AG |
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SARA-R5 Datasheet(HTML) 16 Page - u-blox AG |
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16 / 43 page  SARA-R5 series - Data sheet UBX-19016638 - R06 Interfaces Page 16 of 43 C1-Public 2.5.1.1 Multiplexer protocol SARA-R5 series modules include multiplexer functionality as per 3GPP TS 27.010 [6] on the UART interfaces physical link. This is a data link protocol which uses HDLC-like framing and operates between the module (DCE) and the application processor (DTE), allowing a number of simultaneous sessions over the physical link (UART). When USIO variant 0 or 1 is set, the following virtual channels are defined: Channel 0: control channel Channel 1 – 3: AT commands / data communication Channel 4: GNSS tunneling When USIO variant 2 is set, AT commands and data communication are available on the second auxiliary UART, and the following virtual channels are defined on the primary UART: Channel 0: control channel Channel 1 – 2: AT commands / data communication Channel 3: GNSS tunneling When USIO variant 3 is set, diagnostic trace log is available on the second auxiliary UART, and the following virtual channels are defined on the primary UART: Channel 0: control channel Channel 1 – 3: AT commands / data communication Channel 4: GNSS tunneling When USIO variant 4 is set, GNSS tunneling is available on the second auxiliary UART, and the following virtual channels are defined on the primary UART: Channel 0: control channel Channel 1 – 3: AT commands / data communication 2.5.2 USB interface SARA-R5 series modules include a high-speed USB 2.0 compliant interface with a maximum 480 Mbit/s data rate according to the USB 2.0 specification [9]. The module itself acts as a USB device and can be connected to any USB host equipped with compatible drivers. The USB interface is available for diagnostic purpose only. 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). ☞ It is highly recommended to provide accessible test points directly connected to the USB interface pins (VUSB_DET, USB_D+, USB_D-) for diagnostic purpose. 2.5.3 SPI interfaces ☞ The SPI interfaces are not supported by the “00” products version of SARA-R5 series modules, except for diagnostic purpose. SARA-R5 series modules include 1.8V Serial Peripheral Interfaces available for communications with external SPI slave devices, or with the module acting as SPI master, for diagnostic purpose. |
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