Texas Instruments TIDA-050026-23881, Design Manual, Page: 10 / 24

Hardware, Software, Testing Requirement and Test Result
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10 SLVUBN3A – May 2019 – Revised October 2019
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24-Port (4 Pair) Power Sourcing Equipment Reference Design for Multi-port
Applications
3.2.1.2 LED, Test Point, Jumper and Connector Settings
3.2.1.2.1 EVM LEDs
Table 4 lists the EVM LEDs and their descriptions.
Table 4. EVM LEDs
LED COLOR DESCRIPTION
PSEMTHR24EVM-081
J15, J55 Green, Yellow There is one green and yellow LED on each RJ45 port
PSEMCUDAUEVM-082
D1 Green The total power consumption is within the pre-configured guardband
3.2.1.2.2 EVM Test Points
Table 5 lists the EVM test points.
Table 5. EVM Test Points
TP LABEL DESCRIPTION
PSEMTHR24EVM-081
TP1 55VDC VPWR
TP2 GND VPWR ground
TP3 OC-ALERT System over current alert signal
TP4 SDA I2C data
TP5 SCL I2C clock
TP6 PG1 Power good signal for power supply #1
TP7 PG2 Power good signal for power supply #2
TP8 PSE_3.3V 3.3 V for PSE devices
TP9 GND PSE_3.3V ground
TP10 3.3V_ISO Isolated 3.3 V for MSP430
TP11 3.3V 3.3 V for debug
TPS12 , TP13 GND_ISO 3.3V_ISO ground
TP14 OSS OSS signal from MCU to PSE
TPS23881EM-083
TP1 VPWR VPWR
TP2 PSE_3.3 3.3 V for PSE devices
TP3, TP4, TP14, TP18 GND VPWR and PSE_3.3V ground
TP5 RESET Reset signal from MCU
TP6 OSS OSS signal from MCU
TP7 INT INT signal to MCU
TP8 SCL I2C clock from MCU
TP9 SDA I2C data from and to MCU
TP10 3.3V_ISO Isolated 3.3 V
TP11 PSE_RST Reset signal to PSE
TP12 PSE_OSS OSS signal to PSE
TP13 PSE_INT INT signal from PSE
TP15 GND_ISO 3.3V_ISO ground
TP16 PSE_SDA I2C data from or to PSE
TP17 PSE_SCL I2C clock to PSE