Page 30
Page 31
Figure 11-2:
Crystal oscillator (X1)
11. Crystal oscillator
MOSI2-RG8
MCLR#
SD-CS#
T-D0
RA12
RA13
RB5
RB4
RB3
RB2
RB1
VSENSE
PGC1 PGD1
VREF-1.8
RB8 RB9 LCD-YD LCD-XR
T-D1 RF13 RF12 LCD-YU LCD-XL SD-CD#
LCD-RS
RD14 RD15 MCU-RX MCU-TX
TX1-RF3
RX1-RF2
MOSI1-RF8
MISO1-RF7
SCK1-RF6
SDA1-RG3
SCL1-RG2
T-D2
T-D3
T-D4
T-D5
RA14
RA15
RD8
RD9
RD10
STAT
RD0
RD1
RD2
RD3
PMRD
PMWR
RD4
RD5
RD6
LCD-BLED
RF0
RF1
MP3-DREQ
RG0
T-D6
T-D7
T-D8
T-D9
T-D10
T-D1
1
T-D12
MP3-CS#
MP3-RST#
MP3-DCS/BSYNS
SOSCI
SOSCO
CLKI
CLKO
SCK2-RG6
VCC-3.3
VCC-3.3
VCC-3.3
VCC-3.3
VCC-3.3
VCC-3.3
VREF-1.8
E11
10uF
FERRITE
FP3
VCC-1.8
C30
C31
X3
32.768kHz
X1
8MHz
dsPIC33FJ256GP710A PF
U1
RG15
T-D13
T-D14
T-D15
LCD-RST
RC2
LCD-CS#
FLASH-CS#
MISO2-RG7
R5 27
R4 27
RA12
RA13
RF7
RF6
22pF
C1
C2
22pF
22pF
22pF
E9
10uF
C5
100nF
C6
100nF
C7
100nF
C8
100nF
E8
10uF
Board is equipped with
8Mhz crystal oscillator (X1)
circuit that provides
external clock to the microcontroller
OSC
pins. This base frequency is
suitable for further PLL clock multipliers and ideal for generation of
necessary UART clock, which ensures proper operation of bootloader
and your custom applications. Board also contains
32.768kHz SOSC
oscillator (X3)
which provides external clock for internal
RTCC
module.
Figure 11-1:
Oscillators connected to MCU
