Figure 3 Atx Style Boot - Portwell PCOM-B657VGL User Manual

COM Express™
⚫ ATX Power Sequence
T
PB
T
PSR
T
MP1
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Copyright PORTWELL 2021
PORTWELL PCOM-B657VGL User's Guide

Figure 3 ATX style boot

(Reference from COM Express
PCOM-B657VGL User's Guide
BIOS Starts
® Carrier Design Guide)
VCC_5V_SBY (To CEX)
PWR_BTN# (To CEX)
(Or other wake event)
SUS_S3# (From CEX)
PSON# (To ATX PS)
VCC_12V (To CEX)
VCC_5V For Carrier Board use
VCC_3V3 (not needed by Module)
PWR_OK (To CEX)
Module Internal Power Rails
SYS_RESET# (To CEX) (Optional)
CB_RESET# (From CEX)
PCI_RESET# (From CEX)
18