Propox EVBlpc213 Series, Руководство пользователя

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7
JP1
JP6
Closed
Closed
Closing these jumpers allows in system programming of microcontroller memory via
RS232 port (with use of Philips LPC Flash Utility).
J1 +5V supply voltage for external use.
J15 +3.3V supply voltage for external use.
J14 Ground.
Board supply
The EVBlpc213x board can be supplied from an external power supply with an output of 7-12 V AC or 9-15 V
DC, having a standard plug with a bolt diameter of 2.1 mm, connected to supply socket J3. In case of a DC
supply voltage its polarity is irrelevant.
Reg5V and +3.3V voltages are led to J1 (+5V) and J15 (+3.3V) connectors, ground to J14.
+
C8
470u/25V
D2
1N4148
C13
100n
C12
100n
-
+
2
1
3
4
BR1
RB152
1
2
3
J3
POWER
Vin Vout
GND
7805 U4
+5V
+
C11
47u/16V
SW1
D11
PWR
R22
470R
GND
Figure 3
Implementation of the power supply on the EVBlpc213x board.
LED diodes
The EVBlpc213x has 8 LED diodes which play the role of the simplest interface between the system and the
user. The board is constructed in such a way that it allows any connection between the diodes and
microcontroller leads. A diode lights up when a low signal level is applied to appropriate leads. The LED
current flowing into the microcontroller pin is about 3.5mA.
D9
LED1
D10
LED0
D8
LED2
D7
LED3
D6
LED4
D5
LED5
D4
LED6
D3
LED7
R15 470R
R13 470R
R14 470R
R12 470R
R11 470R
R10 470R
R9 470R
R8 470R
+3.3V
1 2
3 4
5 6
7 8
J10
LEDn
Figure 4 Implementation of LED diodes.