Eurotech BitsyXb, Руководство пользователя

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BitsyXb - User Manual
56 110118-0001A
6.2 Environmental Specifications
The following are environmental specifications for the BitsyXb single-board computer.
Symbol Parameter Min Typ. Max Units
Operating temperature -40 +85 ° C
6.3 Electrical Specifications
This section provides electrical specifications for the BitsyXb single-board computer.
6.3.1 Reset, Sleep, Wakeup
Absolute Maximum Ratings
Reset Input (/RESET_IN) ............................ 3.6 V (note 1)
Wakeup Input (/RQOnOff) ......................... 5.5 V (note 2)
Symbol Parameter Min Typ. Max Units
/RESET_IN (J10.45)
Vrst trigger voltage (Note 3) 2.7 V
Vprst pull-up voltage Vddx V
Rprst pull-up resistance 47
k Ω
Sleep (5.3.3)
Vsleep Sleep trigger voltage (Note 4) 5.4 5.8 V
Vsleep,hyst
Sleep trigger release hysteresis
(Note 5)
0.06 0.25 V
Wakeup: /RQOnOff (J3.45)
trq wakeup pulse duration (Note 6) 100 ms
Vprq pull-up voltage Vddx V
Rprq pull-up resistance 11 k Ω
Notes:
1. The reset controller can support operating voltages up to 10 VDC. However, such high
voltages on Vddx through the pull-up resistor may damage the system.
2. The /RQOnOff signal is connected to the system controller, which determines this rating
(see section 6.3.7).
3. Short /RESET_IN to GND to reset system.
4. This is the voltage at VBATT_POS at which the DC_GOOD signal (section 4.3.7) changes
from high to low, which can trigger the system to go into Sleep mode. Sleep trigger at
DCIN_POS is Vdin (section 6.3.4).
5. Important! Once Vsleep has been triggered, the input voltage must rise at least
Vsleep,hyst above Vsleep before the voltage detector will restore the DC_GOOD signal.
Make sure that your input voltage is designed to always run above Vsleep,hyst, or
systems that go to sleep may not be able to wake again.
6. Short /RQOnOff to GND for at least trq to wake up system. A low-level voltage on
/RQOnOff initiates wakeup.