Using internal voltage regulator for enCoRe II | Cypress Semiconductor
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Using internal voltage regulator for enCoRe II
How can I use the enCoRe II internal voltage regulator?
The emulation pods also have a place to hold the output cap if the internal 3.3V regulator is used. This cap should be removed if the pod is used later for emulation in a design that uses the VREG pin as a GPIO.
Pins P1.3 to P1.6 can use alternate drive of 3.3V only if the Vreg capability is enabled in the enCoRe II devices
In the USB suspend mode, current drawn should be minimal. The VREG feature, when enabled draws a minimum of at least 500µA. So, in the USB suspend, VREG should be disabled or configured in the "Keep Alive" mode (Keep Alive mode can be configured by enabling a bit (bit ) in the VREGCR register). This feature enables light loads of up to 20µA to be loosely regulated around 3.3V.
The enCoRe II data sheet can be viewed by clicking here:
enCoRe II Data-sheet
Keywords: enCoRe II, voltage regulator, VREG, VREGCR.