phyCORE-OMAP44xx
Part I: PCM-049/phyCORE-OMAP44xx System on Module
L-760e_1 © PHYTEC Messtechnik GmbH 2012
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1.4 Power
The phyCORE-OMAP44xx operates off of a single power supply voltage.
The following sections of this chapter discuss the primary power pins on the phyCORE-Connector X1 in detail.
1.4.1 Primary System Power (VCC_3V3_IN)
The phyCORE-OMAP44xx operates off of a primary voltage supply with a nominal value of +3.3 V. On-board
switching regulators generate the 0.93V, 1.2 V, 1.8 V, 2.1 V and 3 V voltage supplies required by the OMAP44xx
MCU and on-board components from the primary 3.3 V supplied to the SOM.
For proper operation the phyCORE-OMAP44xx must be supplied with a voltage source of 3.3 V ± 5% with 1.0 A
load at the VCC pins on the phyCORE-Connector X1.
VCC_3V3_IN: X1 1C, 2C, 3C, 4C, 5C, 1D, 2D, 3D, 4D, 5D
Connect all +3.3 V VCC input pins to your power supply and at least the matching number of GND pins.
Corresponding GND: X1 6C, 11C, 16C, 21C, 26C, 6D, 9D, 14D, 19D, 24D
Please refer to
for information on additional GND Pins located at the phyCORE-Connector X1.
1.4.2 Backup Voltage (VBAT)
To backup the RTC of the PMIC TWL6030 on the module, a secondary voltage source of 3.3 V can be attached to
the phyCORE-OMAP44xx at pin X1C7. This voltage source is supplying the backup voltage domain VBACKUP of
the PMIC which again supplies the RTC and some critical registers if the primary system power (VCC_3V3_IN) is
removed. Applications not requiring a backup mode can connect the VBAT pin to the primary system power
supply (VCC = 3.3 V), or can leave it open.
Caution:
As a general design rule we recommend connecting all GND pins neighboring signals which are being used in
the application circuitry. For maximum EMI performance all GND pins should be connected to a solid ground
plane.
