User's Manual l TQMa7x UM 0203 l © 2022, TQ-Systems GmbH
Page 39
Attention: Power-Up sequence
To avoid cross-supply and errors in the power-up sequence, no I/O pins may be driven by external
components until the power-up sequence has been fully completed.
The end of the power-up sequence is indicated by a high level of signal VCC3V3_MB_EN.
Note: BOOT_MODE / BOOT.CFG
The BOOT_MODE and BOOT.CFG pins each have dedicated reference voltages,
which are provided by the TQMa7x, see 3.2.9.3.
3.2.7.7
Standby
The i.MX7 supports in combination with the PMIC several Standby modes. Details can be found in the i.MX7 Data Sheets (1), (2)
and the PMIC Data Sheet (4).
Note: Suspend to RAM
Suspend-to-RAM is not supported in LPSR mode.
TQMa7x with discrete RTC (see 3.2.3) have to be supplied with 5 V, if the PMIC Standby feature has to
be used, since the PMIC LICELL pin is not supplied.