User's Manual l TQMa335xL UM 0101 l © 2019, TQ-Systems GmbH
Page 23
3.2.6
WDOG
The AM335x provides a Watchdog Timer. If the Watchdog-Timer is active and not reset within the specified time,
a reset is signalled to the PRCM. The PRCM then triggers a Warm-Reset.
More information can be found in the AM335x Reference Manual (3).
3.2.7
Power supply
3.2.7.1
Main power supply
The input voltage for the TQMa335xL is 3.3 V ±3 %. All I/O voltages have a fixed supply voltage of 3.3 V.
LGA pads
PMIC
3.3 V
CPU
VCC2
VCC1
VCCn
Module
components
Illustration 10: Block diagram power supply
3.2.7.2
Overview TQMa335xL supply
The given current consumption has to be seen as an approximate value.
To estimate the power consumption of the system, the Texas Instruments Application Note
should be taken note of, as the current consumption of the TQMa335xL strongly depends on the application,
the mode of operation and the operating system.
The following table shows some technical parameters of the TQMa335xL supply and power consumption.
Table 34:
Parameter TQMa335xL supply
Parameter
Value typ.
Remark
Supply voltage V
IN
3.3 V
±3 % for TQMa335xL without extended voltage supervision
Supply voltage V
IN
3.3 V
±2 % for TQMa335xL with extended voltage supervision
Power consumption Linux (idle)
~ 1.2 W
AM335x 800 MHz / BSP without power management
Power consumption Linux (100 %)
~ 1.8 W
AM335x 800 MHz / BSP without power management
Power consumption standby
~ 210 mW
AM335x 800 MHz / BSP without power management
