Texas Instruments Dual-Slot ATCA AdvancedMC TPS2358, User Manual, Page: 13 / 23

7 EVM Feature Details
7.1 Test Points
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EVM Feature Details
The TPS2358EVM contains numerous test points throughout the circuit for user monitoring of waveforms
and voltage measurement.
Table 7 lists the module test points and the signal available at each one. The
EVM PCB layout connects all ground nodes and supply returns to a common GND node, via several
power plane areas. However, due to potentially high loading conditions on the two Payload Power outputs,
multiple ground test points are provided to mitigate the measurement impact of return current drops.
Therefore, where appropriate, certain test points are paired in the table with the pertinent reference point
for meter return connections.
Table 7. Module Test Points
TEST REF. POINT SIGNAL DESCRIPTION
POINT NAME
NAME
TP1 TP3 12VIN1 Input 12 V supply for AdvancedMC™ Slot A
TP2 3V3IN1 Input 3.3 V supply for AdvancedMC™ Slot A
TP4 TP6 12VIN2 Input 12 V supply for AdvancedMC™ Slot B
TP5 3V3IN2 Input 3.3 V supply for AdvancedMC™ Slot B
TP7 TP9 SLOTA_PWR AdvancedMC™ Slot A Payload Power, 12 V output
TP8 SLOTA_MP AdvancedMC™ Slot A Management Power, 3.3 V output
TP10 TP12 SLOTB_PWR AdvancedMC™ Slot B Payload Power, 12 V output
TP11 SLOTB_MP AdvancedMC™ Slot B Management Power, 3.3 V output
TP13 TP24, TP25 EN3A Active-low enable input to TPS2358 for the channel A 3.3 V rail
TP14 EN3B Active-low enable input to TPS2358 for the channel B 3.3 V rail
TP15 TP16 Slot A 12-V load current sense voltage
TP17 TP24 PASSA TPS2358 channel A pass FET gate drive output
TP18 BLKA TPS2358 channel A block/OR’ing FET gate drive output
TP19 TP20 Slot B 12-V load current sense voltage
TP21 TP25 PASSB TPS2358 channel B pass FET gate drive output
TP22 BLKB TPS2358 channel B block/OR’ing FET gate drive output
TP26 TP24, TP25 EN12A Active-low enable input to the TPS2358 for the channel A 12-V rail
TP27 EN12B Active-low enable input to the TPS2358 for the channel B 12-V rail
TP28 ORENA Channel A OR’ing FET/function enable signal to the TPS2358
TP29 ORENB Channel B OR’ing FET/function enable signal to the TPS2358
TP30 TP24, TP25 CT3B Timing cap waveform for the Slot B 3.3-V rail (SLOTB_MP)
TP31 CT3A Timing cap waveform for the Slot A 3.3-V rail (SLOTA_MP)
TP32 CT12B Timing cap waveform for the Slot B 12-V rail (SLOTB_PWR)
TP33 CT12A Timing cap waveform for the Slot A 12-V rail (SLOTA_PWR)
TP34 Var. FLT12A Slot A 12-V open-drain, active-low FAULT output indication
TP35 PG12A Slot A 12-V open-drain, active-low POWERGOOD output indication
TP36 FLT12B Slot B 12-V open-drain, active-low FAULT output indication
TP37 PG12B Slot B 12-V open-drain, active-low POWERGOOD output indication
TP38 FLT3A Slot A 3.3-V open-drain, active-low FAULT output indication
TP39 PG3A Slot A 3.3-V open-drain, active-low POWERGOOD output indication
TP40 FLT3B Slot B 3.3-V open-drain, active-low FAULT output indication
TP41 PG3B Slot B 3.3-V open-drain, active-low POWERGOOD output indication
On the TPS2358EVM, the device fault (FLTx) and power good (PGx) outputs are all used to drive the
STATUS LED’s. Power for LED drive is derived from a diode-OR of the two 3.3-V input supplies.
SLUU328 – August 2008 TPS2358 Dual-Slot ATCA™ AdvancedMC™ Controller Evaluation Module 13
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