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Pico E-15 Hardware Reference
www.picocomputing.com
Pico Computing
(206) 283-2178
150 Nickerson Street. Suite 311
Seattle, WA 98109
15
Sleep Controller
The Pico E-15 contains one Cypress PSoC which is used to generate a clock for the
bootloader and control the power state.
The E-15 can be placed in a state where it draws almost no power, then wakes up
automatically after a set amount of time.
The sleep controller can be activated by the FPGA, or the external peripheral interface
connector.
The protocol for entering sleep state is simple. Simply pulse FPGA_POWERCTL_C for as
many seconds as your wish to sleep, then lower the FPGA_POWERCTL_D signal.
The Pico E-15 will awake from sleep if any of the following conditions are true:
-Power is first applied
-The sleep timer has run out
-POWERCTL_D is low and POWERCTL_C is high
The Pico E-15 will enter sleep mode if any of the following conditions are true:
-An overtemperature condition is detected
-The FPGA_POWERCTL_D pin is low
-The POWERCTL_C pin is low