User Manual

Page 93
ICE Module
Table 5-3: ATX Power On Sequence Timing
Parameters min Max Description
T0
T1
T2
T3
T4
T5
T6
T7
T8
5.5 AT Power Delivery Guideline
AT power source will provide 12V, 5V power. The additional switching regulator or
LDO will be required to simulate the ATX power (3.3V…). There will be no standby
voltage once AT power source be used.
5.5.1 AT Power Diagram
AT Power
Source
12V
5V
COM-
Express
Module
3.3V
Figure 5-5: AT Power Delivery Block Diagram