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| author | Martin Braun <martin.braun@ettus.com> | 2022-03-14 14:07:16 +0100 |
|---|---|---|
| committer | Aaron Rossetto <aaron.rossetto@ni.com> | 2022-03-28 12:54:07 -0700 |
| commit | 7753371e8b3ce916335ff5dc81fe8f5333a7d3d3 (patch) | |
| tree | f579728c800f3d30e06d6eafe6142042d533c6b1 /host/docs/usrp_e3xx.dox | |
| parent | a705845c4cd42186b8da9853b6d2d31eb3f72848 (diff) | |
| download | uhd-7753371e8b3ce916335ff5dc81fe8f5333a7d3d3.tar.gz uhd-7753371e8b3ce916335ff5dc81fe8f5333a7d3d3.tar.bz2 uhd-7753371e8b3ce916335ff5dc81fe8f5333a7d3d3.zip | |
docs: Update E320 docs
- Clarify purpose of 'enclosure' flag
- Add section on clock and time sync, which the E31x section already has
Diffstat (limited to 'host/docs/usrp_e3xx.dox')
| -rw-r--r-- | host/docs/usrp_e3xx.dox | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/host/docs/usrp_e3xx.dox b/host/docs/usrp_e3xx.dox index 5703c479b..1fe37d195 100644 --- a/host/docs/usrp_e3xx.dox +++ b/host/docs/usrp_e3xx.dox @@ -1039,7 +1039,7 @@ GPS-disciplined oscillator (GPSDO) on the board, the value "gpsdo" was named such for better compatibility with code written for other devices. The device provides a 3.3V supply voltage to an external antenna connected to the *GPS* port -of your device. Note that this supply voltage is turned off in order to safe power upon destruction of the software object. +of your device. Note that this supply voltage is turned off in order to save power upon destruction of the software object. \subsection e31x_hw_gpio Internal GPIO @@ -1300,6 +1300,15 @@ input, 10 MHz external clock reference. The connectors are labeled RF A and RF B and are powered by the two channels of AD9361 RFIC. +\subsection e320_hw_sync Clock and Time Synchronization + +Unlike the E31x, but like most other USRPs, the USRP E320 has separate inputs for +clock and time reference. There is no separate internal 10 MHz oscillator, when +selecting an 'internal' reference, the GPSDO is used to create reference signals. + +The values 'internal' and 'gpsdo' are thus interchangeable and mean the same +thing. + \subsection e320_gpio Front Panel GPIO ### Front Panel GPIO Connections @@ -1334,6 +1343,11 @@ For example, to set your device to auto-boot, with TPM, and with fans, the flag $ eeprom-set-flags 0x3 +The enclosure flag is typically set during the manufacturing process, and can be +used to identify if the board has an enclosure is used. The firmware and thermal +subsystems of this device also use this flag to load different default thermal +settings (see the [SCU firmware code](https://github.com/EttusResearch/usrp-firmware/blob/a190641b349b1bfdbdd9f471f82613971e50e375/board/neon/board.c#L191-L205)). + \section e3xx_regmap E3XX FPGA Register Map The following tables describe how FPGA registers are mapped into the PS. |