mikroElektronika mikromedia+ for PIC32MX7, Руководство пользователя

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Figure 13-2: LEDs connecting schematic
13. Indication LEDs
Figure 13-1: On-board LEDs
An LED (Light-Emitting Diode) is a highly efficient electronic
source of light. When connecting LEDs, it is necessary to use
a current limiting resistor. A common LED diode voltage is
approximately 2.5V, while the current varies from 1 to 20mA
depending on the type of LED. The Multimedia Board uses LEDs
with current I=1mA.
R44
4K7
R45
4K7
R46
4K7
LD0
LED
LED-0
LED-2
LED-
1
LED-
0
LED-
1
LED-
2
LD1
LED
LD2
LED
VCC3
VCC3
PIC32MX795F512L
RE4
RB6 RB7 RA9 RA10 AVCC AGND RB8 RB9 RB10 RB1
1
GND VCC RA1 RF13 RF12 RB12 RB13 RB14 RB15 GND VCC RD14 RD15 RF4 RF5
RE3 RE2 RG13 RG12 RG14 RE1 RE0 RA7 RA6 RG0 RG1 RF1 RF0 VCC VCAP RD7 RD6 RD5
RD13 RD12 RD3 RD2 RD1
RD4
RG15 GND
RC14
RC13
RD0
RD11
RD10
RD9
RD8
RA15
RA14
GND
OSC2
OSC1
VCC
RA5
RA4
RA3
RA2
RG2
RG3
VUSB
VBUS
RF8
RF2
RF3
VCC
RE5
RE6
RE7
RC1
RC2
RC3
RC4
RG6
RG7
RG8
MCLR
RG9
GND
VCC
RA0
RE8
RE9
RB5
RB4
RB3
RB2
RB1
RB0
VCC3 VCC3 VCC3
VCC3
VCC3
VCC3
E9
10uF
There are three LEDs on the Multimedia Board that can be assigned a signal
function. LEDs are connected to the following I/O microcontroller pins: LD0
- RA0, LD1 - RA1 and LD2 - RD9. The LED marked
POWER indicates when
the system is turned on, whereas the diode marked MMC/SD is used to
indicate memory card activity.