User's Manual l TQMLS10xxA UM 0105 l © 2022, TQ-Systems GmbH
Page 11
4.7
Power supply
4.7.1
Input voltage
The TQMLS10xxA requires a 5 V supply with a maximum tolerance of ±5 %.
4.7.2
Feedback voltages
The voltages DVDD, LVDD, TVDD, and VCCGPIIN can be fed back according to customer requirements:
Power
V
IN
1.2 V
TQMLS10xxA connectors
Power
3.3 V
Power
2.5 V
Power
1.8 V
TVDD
1.2V / 1.8V / 2.5V
DVDD
1.8V / 3.3V
LVDD
1.8V / 2.5V
VCCGPIIN
1.8V / 2.5V / 3.3V
Carrier Board
TQMLS10xxA
Figure 9:
Block diagram feedback voltages
The TQMLS10xxA provides the respective voltages in order to enable a simple connection according to customer requirements
on the carrier board. The voltages generated on the TQMLS10xxA may only be used for the TQMLS10xxA itself. Further loads by
external circuitry on a carrier board are not permitted and may lead to supply and monitoring errors.
Voltage EVDD is switched on the TQMLS10xxA:
•
EVDD = 3.3V if SDHC_EXT_SEL = 1 (SD card)
•
EVDD = 1.8V if SDHC_EXT_SEL = 0 (eMMC)
4.7.3
Power-up sequencing
The power-up sequencing is executed and monitored by the TQMLS10xxA.PORESET# is kept Low during power-up.
4.7.4
Voltage monitoring
All voltages generated on the TQMLS10xxA are monitored.
