User's Manual l MBa57xx UM 0100 l © 2020, TQ-Systems GmbH
Page 15
4.1.6
Power Management and Reset
Illustration 5:
Block diagram Power
The following table shows the signals used for power management.
Table 12:
Functions of power signals
Signal
Source
Dir. Default
Remark
PMIC_REGEN1
TQMa57xx PMIC
O Low
Is activated by the TQMa57xx during power sequencing
and switches on the carrier board controller for 3.3 V.
PWR_EN_3V3_DISPLAY
Port-Expanders
PCA9555PW
O Low
Enable for display power supply (X54)
PWR_EN_1V5
O Low
Enable for 1.5 V supply
PWR_EN_1V1
O Low
Enable for 1.1 V supply
PMIC_PWRON#
Power Button /
SDIO extension header
I
High
See TQMa57xx User's Manual. Can be used
with push button S9 and SDIO extension header.
