Data Sheet

Compute Module Datasheet

Supply Descripion Minimum Typical Maximum Unit

VBAT Core SMPS Supply 2.5 - 5.0 + 5% V

3V3 3V3 Supply Voltage 3.3 - 5% 3.3 3.3 + 5% V

1V8 1V8 Supply Voltage 1.8 - 5% 1.8 1.8 + 5% V

VDAC TV DAC Supply

2.5 - 5% 2.8 3.3 + 5% V

GPIO0-27 VDD GPIO0-27 I/O Supply Voltage 1.8 - 5% - 3.3 + 5% V

GPIO28-45 VDD GPIO28-27 I/O Supply Voltage 1.8 - 5% - 3.3 + 5% V

SDX VDD Primary SD/eMMC Supply Voltage 1.8 - 5% - 3.3 + 5% V

Requires a clean 2.5-2.8V supply if TV DAC is used, else connect to 3V3

Table 7: Power Supply Operating Ranges

7.1 Supply Sequencing

Supplies should be staggered so that the highest voltage comes up ﬁrst, then the remaining voltages

in descending order. This is to avoid forward biasing internal (on-chip) diodes between supplies, and

causing latch-up. Alternatively supplies can be synchronised to come up at exactly the same time as

long as at no point a lower voltage supply rail voltage exceeds a higher voltage supply rail voltage.

7.2 Power Requirements

Exact power requirements will be heavily dependent upon the individual use case. If an on-chip subsys-

tem is unused, it is usually in a low power state or completely turned off. For instance, if your application

does not use 3D graphics then a large part of the core digital logic will never turn on and need power.

This is also the case for camera and display interfaces, HDMI, USB interfaces, video encoders and

decoders, and so on.

Powerchain design is critical for stable and reliable operation of the Compute Module. We strongly

recommend that designers spend time measuring and verifying power requirements for their particular

use case and application, as well as paying careful attention to power supply sequencing and maximum

supply voltage tolerance.

Table 8 speciﬁes the recommneded minimum power supply outputs required to power the Compute

Module.

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