Part II: PCM-959/phyCORE-OMAP44xx Carrier Board
phyCORE-OMAP44xx
98
©
PHYTEC Messtechnik GmbH
2012
L-760e_1
2.1.3.2 Power
Figure 21:
Powering Scheme
The primary input power of the phyCORE-OMAP44xx Carrier Board comes from either the wall adapter jack X6
(+12 V or +24 V), or the Power-over-Ethernet circuit (via the Ethernet jack X9).
Switching regulators on the carrier board generate five different voltages to supply the phyCORE-OMAP44xx and
the different components of the system. The following table lists the 5 voltage domains and their main use.
Voltage domain
Description
VCC_12_24
Main supply voltage from wall adapter input at X6 or Power of Ethernet
(+12 V to +24 V DC) at X9
VCC_5V
5 V voltage domain required for different interfaces, such as USB, HDMI, etc.
VCC_3V3
3.3 V voltage domain supplying the phyCORE-OMAP44xx and various peripherals
VCC_5V_FIX
5 V voltage domain to supply the 1.8 V and 1.2 V regulators
VCC_1V8
1.8 V voltage domain supplying some peripherals (e.g. audio codec, etc.)
VCC_1V2
1.2 V voltage domain to supply DSI2LVDS Bridge Chip only
Table 43:
Voltage Domains on the Carrier Board