Today we are going to demonstrate how to control TPS23880 EVM GUI TPS23880 is an eight channel PSE controller which will support and I triple E 802.3 BT draft standard. And following this more information is available at www.ti.com/product/tps23880.
Before you start the EVM GUI, make sure the USB 2ANY adapter is connected from your laptop to TPS23880 EVM through J2 and the EVM is supplied with a 44 volt to 57 volts power supply through J1. J7, J8, J19, J20 are used for two pair PoE and J9 and J21 are used for four pair PoE After everything is connected, open the TPS23880 EVM GUI.
After opening TPS23880 EVM GUI, you can easily find links to the EVM user's guide, datasheet, E2E forum, and programmer's guide, which have more detailed information about the device and EVMs. Before configuring TPS23880, we have to make sure that QC Slave address in GUI matches the address setting on the EVM. J4 is the place where you can configure the QC Slave address with jumpers. This area is used to convey the device address while the default value is hex 20 which matches the configuration of the EVM.
TPS23880 device address can be decided by A1 to A4 pins and the address can be any even number between has hex 20 and hex 3E. The details are described in pins data's register. Once the QC slave address is configured, the device should be shown as connected. Then it will load the firmware into SRAM automatically like this.
Once the firmware is loaded, you can click Quick Start to configure the six ports on the EVM. After clicking the Quick Start, this page enables configuring each port by clicking the RJ45 icon or you can hold Shift to select multiple ports to sight at the same time. There are 9 programmable functions, faster shutdown, 2 pair current policing, DC disconnect, alternative inrush foldback, alternative operational foldback, and the auto autoclass adjustment. These functions are used for both two pair and four pair ports while the four current policing, four pair inline fault management, and four pair pcut fault management are used for four pair ports. Details of every function are in Register, Hex 13, 15, 2D, 50, and 55.
Or you can click here to set all parts or a single port to standard configuration. And you can also set all ports to auto mode where the ports will operate automatically. If you want to change the power of every port or set the port in off mode, you could click the pull down menu like this. After configuring the PSE, we can click the Proceed to move on to the operation page. Control button and port status are shown on this page. You can also monitor the SRAM revision, input voltage, and the temperature here.
Clicking the OSS button will shut down the ports, which are enabled or as a function. And clicking the reset button, we reset the PSE chip. In semi-auto mode, powering [INAUDIBLE] needs to be initiated after a valid PD is detected and classified. For four pair port, connecting a single signature PD, 4 pair enable and disable should be used to control the port. The timing of inline fault, inrush fault, icut fault, and DC disconnect can be configured through timing configuration column.
In semi auto mode, when plugging the TPS2373-4 EVM, the detection, classification, and auto class result are shown. Then you can click four pair enable to turn on the port. Once the port is on, the RJ45 connector turns to green to show that two channels are both on. The detection status, connection checks results, classification status, placing, auto class, voltage, current, and power of each channel are displayed. For four pair port, the total power would be also shown in class column, a required class at the class level of PD and their design class in the class level that PSE is able to support. PD's capability of supporting all the class function is displayed in auto class column. Auto class function helps distribute the powering efficiently
In auto mode after the insertion of TPS2373-4 EVM, the port will automatically turn on once the detection and the classification is valid. The false status indicate 12 different faults, including poor faults, and device faults like disconnect event and the V power undervoltage fault. If any faults occur, the number of faults will appear and you can check the full details. In the meantime, you can click the brush icon to clear all the faults.
In semi auto mode, if you a do signature PD is plugged in like TPS 2378-4 EVM-602, the connection check result will show DS and you can't click four pairing enable to turn on two channels at the same time. Or you can click two pairing enable to turn on two channels separately. If the TPS-2378-4 EVM, which is a single signature PD supporting autoclass function, is plugged into four pair port, in auto class column you can see that it has indicated that the PD can support autoclass class function and the power of each channel is displayed.
Clicking the MAC button can force an auto class merriment on corresponding channel. Then you can see that the AC power will be updated if the output power is changed. All of the operations mentioned before are the same in two pair ports except that there is no connection check. You can enter the register map page by clicking the pencil icon on the left. In this page, you can read or write all of the register of TPS23880. And you can see the register description by clicking the question mark. Thanks for watching. If you need more information of TPS23880, you're welcome to visit www.ti.com/product/tps23880. This website is under heavy load (queue full)
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