PICO-IMX6UL-EMMC REV. A1. HARDWARE MANUAL
– VER 1.00 – MAR 28 2016
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3.12.2. Power Sequence
PICO-IMX6UL-EMMC input power sequencing requirements are as follow:
If a backup Real Time Clock (RTC) is required in the host system. We recommend to design an RTC
circuit on the PICO carrier board. For example the Maxim Integrated connected over the
general purpose I
2
C can be used.
Start Sequence:
VCC_RTC must come up at the same time or before VCC comes up.
Stop Sequence:
VCC must go down at the same time or before VCC_RTC goes down
Table 24 - Input Power Sequencing for AT based configurations
Item
Description
Value
T1
VCC_RTC rise to VCC rise
≥ 0 ms
T2
VCC fall to VCC_RTC fall
≥ 0 ms
Figure 8 - Input Power sequence for AT based configurations
