REL 1.2
Page 48 of 56
iWave Systems Technologies Pvt. Ltd.
i.MX6 SODIMM SOM Hardware User Guide
3.1.2
Power Input Sequencing
i.MX6
SODIMM SOM’s Power Input sequence r
equirement is explained below.
Power up Sequence:
VRTC_3V0 must come up at the same time or before VIN_3V3 comes up.
Power down Sequence:
VIN_3V3 must go down at the same time or before VRTC_3V0 goes down.
Figure 4: i.MX6 SODIMM SOM Power Sequence
Note: VBUS_5V is not part of the power supply sequence and can be powered at any time.
Table 8: Power Sequence Timing
Item
Description
Value
T1
VRTC_3V0 rise time to VIN_3V3 rise time
≥ 0 ms
T2
VIN_3V3 fall time to VRTC_3V0 fall time
≥ 0 ms
Important Note: All the carrier board power supplies should be powered ON only after the SOM is powered ON
completely. Otherwise it can cause internal latch-up and malfunctions/bootup issues due to reverse current flows.