13
embeddedglow.com
DBAT90USB162 Enhanced
Development Board User’s Manual
VCC presence, no matter what the power source is, is indicated by the green VCC
ON LED (D5).
2.2.7. Built-in voltage regulator
The built-in voltage regulator depending on J5 produces 3.3 V or 5 V from a source,
connected to PWR1 (P7) or PWR2 (P8). Based on LM1117, the voltage regulator
can deliver up to 0.8 A from 5.2 V to 20 V input.
Please obey maximum power
dissipation, which is around 1.2 W, otherwise thermal shutdown may occur!
VREG
J5
3.3 V
short
5 V
open
Power jack (PWR1, P7) pinout:
Shottky diode D1 serves as a reverse polarity protection.
2.2.8. User button BUT1
BUT1 can be used as a general use button or for debugging purposes. It can be
detached from PC2 by leaving J11 open. To use PC2 I/O pin for other purposes
leave J11 open. BUT1 signal is available via header P13. Optionally capacitor C13
can be used. The PCB accepts thru-hole and 0805 SMD.
BUT1
J11
In use
short
Not in use
open
2.2.9. User LED LED1
LED1 can be used as a general use LED or for debugging purposes. It can be
detached from PC4 by leaving J12 open. To use PC4 I/O pin for other purposes
leave J11 open. LED1 signal is available via header P14.
LED1
J12
In use
short
Not in use
open
