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Component Descriptions and Connections
UG0209 User Guide Revision 7.1
17
5.8
SPI Flash
One 8 MByte SPI flash Atmel AT25DF641-MWH-T is also offered on the board (
This is interfaced with the SmartFusion MSS SPI0 port (
page 17). The WP# and HOLD#
inputs are pulled high on the board.
Figure 15 •
SPI Flash
Figure 16 •
SmartFusion MSS SPIO Port
5.9
20 MHz Oscillator
A 20 MHz resonator of 20 PPM is placed across the MAINXIN and MAINXOUT pins of the SmartFusion
cSoC with the appropriate 18 pF capacitors (
page 17). This is used to generate a high
precision clock for Ethernet MAC and is also used in real-time counter (RTC) based applications.
5.10
32.768 KHz (Low-Power) Oscillator
A 32.768 KHz resonator CM519 is placed across the LPXIN and LPXOUT pins of the SmartFusion cSoC
with the appropriate 30 PF capacitors, as shown in the following figure. This low-power resonator is
useful in real-time counter (RTC) based applications.
Figure 17 •
20 MHz and 32.768 MHz Oscillators
SPI_CS_N
SPI_SCK
SPI_SI
SPI_WP_N
SPI_SO
V3P3
V3P3
8 MByte
Mfr P/N : AT25DF641-MWH-T
Mfr: Atmel
R209
10K-0603
R209
10K-0603
R208
10K-0603
R208
10K-0603
R206
39R-0603
R206
39R-0603
C70
0.1uF 10V-0402
C70
0.1uF 10V-0402
SI
5
SCK
6
HOLD
7
CS
1
WP
3
VCC
8
GND
4
SO
2
E_GND
9
U13
AT25DF641-MWH-T
U13
AT25DF641-MWH-T
SPI_CS_N
SPI_SI
SPI_SO
SPI_SCK
SPI_0_DO/GPIO_16
U17
SPI_0_SS/GPIO_19
Y20
SPI_0_DI/GPIO_17
V18
SPI_0_CLK/GPIO_18
W19
SPI_1_DO/GPIO_24
T17
SPI_1_DI/GPIO_25
V19
SPI_1_CLK/GPIO_26
AA22
SPI_1_SS/GPIO_27
W21
SPI INTERFACE
PORT0
PORT1
U64-15
A2F200M3F-FGG484
SPI INTERFACE
PORT0
PORT1
U64-15
A2F200M3F-FGG484
R235
39R-0603
R235
39R-0603
PTBASE
V1P5_INT
V1P5_INT
V1P5_INT
RTC_SW
RESET CIRCUIT
AGND AGND
AGND AGND
PCAP
AB5
NCAP
AB6
PU_N
W17
PTBASE
AB20
PTEM
Y18
MAINXIN
AA16
LPXIN
AA18
MAINXOUT
AA17
LPXOUT
AA19
U64-2
A2F200M3F-FGG484
U64-2
A2F200M3F-FGG484
Y2
CM519 32.768KDZF-UT
Y2
CM519 32.768KDZF-UT
C52
30pF-0603
C52
30pF-0603
Y1
ABM3-20.000MHZ-B2-T
Y1
ABM3-20.000MHZ-B2-T
C53
0.1uF-0402
C53
0.1uF-0402
C48
18pF-0603
C48
18pF-0603
C51
30pF-0603
C51
30pF-0603
C50
18pF-0603
C50
18pF-0603
1
2
3
4
SW4
KSC403J 50SH LFG
SW4
KSC403J 50SH LFG
1
2
C49
2.2uF 16V-0603
C49
2.2uF 16V-0603