Verdin Carrier Board Design Guide
Preliminary – Subject to Change
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3 Power Management
3.1 Power Signals
All Verdin modules are capable of being powered with a single main power supply powering VCC,
and if required, a low current backup power supply for purposes such as Real Time Clock (RTC)
support. The main power supply input has a wide range of 3.135V to 5.5V (absolute). This allows
supplying the module from a 3.3V +/-5%, or 5V +/-10% or a single Lithium battery cell. For
simple applications, the module can run directly from a USB power port.
The Verdin form factor is targeted for Thermal Design Power (TDP) of up to 5W for the module.
Based on the power supply rating of the connector pins and the number of pins assigned as main
(VCC) power supply pins, the maximum current draw form VCC is 2.5 amps.
Most of the GPIO capable I/O pins run on 1.8V logic level. Verdin modules provide a 1.8V
reference output with current of up to 250mA. Carrier boards may use this power source directly as
the only 1.8V supply for their peripherals. This saves complexity and cost on the carrier board.
3.1.1 Power Supply Signals
Main power supply input for the module
10, 11, 18, 27, 28, 33, 39, 40,
45, 50, 51, 65, 68, 71, 77, 83,
86, 89, 97, 98, 103, 109, 110,
115, 121, 122, 127, 134, 145,
146, 158, 167, 170, 173, 179,
182, 194, 195, 204, 209, 223,
224, 229, 230, 236, 242, 243
Common signal and power ground
RTC supply, can be left unconnected if
internal RTC is not used
250mA output for carrier board peripherals
Table 36: Power supply signals
3.1.2 Power Management Signals
Beside the power supply signals, the Verdin form factor supports several power-management
signals. Most of these signals are optional for the carrier board. However, they allow different
power management schemes for the carrier board from a very simple approach to an advanced
one with extra power saving features and systems with single cell Lithium batteries.
Reset output for carrier board peripherals. This reset is
derived from the SoC reset on the module. Note that
during and/or after a sleep state, the
CTRL_RESET_MOCI# does not get asserted. The output
is an open drain type without pull-up resistor on the
module. The signal is 3.3V tolerant. The carrier board can
pull the signal up to 1.8V or 3.3V. The signal can be left
floating on carrier board.
Enable signal for the power rails of the carrier board
peripherals. This output remains high during sleep
modes.
Enable signal for the power rails on the carrier board
peripherals which need to be turned off during sleep
mode. It is only high during running mode. The signal is
standard GPIO with an on-module 10k pull-down
resistors. The signal is defined during the power up
sequence. The signal can be left floating on carrier board.
Open drain input which resets the module if shorted to
ground on carrier board. One 100k on-module pull-up to
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