Atmel SMART SAM4C Series User Manual page 12

Figure 3-8. TWI EEPROM Schematic
3.4.2 SPI Serial Flash
The SAM4C32-EK embeds one serial Flash device AT25DFxx or AT45DBxx connected through the SPI. (The
AT25DF321A is mounted by default.)
Figure 3-9. SPI Serial Flash Schematic
®
3.4.3 Adesto Compatible Devices
Table 3-3. Compatible Devices
®
Adesto AT45DB Series Devices
AT45DB64D2-CNU
AT45DB321D-MWU
AT45DB131D-SS
AT45DB081D-SS
AT45DB041D-SS
AT45DB021D-SS
AT45DB011D-SS
VDDMAIN
R41 R42
4.7K 4.7K
PA25
(SCL)
PA24
(SDA)
VDDMAIN
C62 100nF
PA7 R100 33R SPI0_MOSIC
PA6 R101 33R SPI0_MISOC
PA8 R102 SPI0_SPCKC
33R
PA5 R103 0R SPI0_NPCSC
R105 470K
VDDIN
R100 to R103 should be close to SAM4C32.
SPI0_MOSIC 1
2
SPI0_SPCKC
3
VDDIN
SPI0_NPCSC 4
U13 and U10 PCB footprints
differ by 90 degrees and are stacked.
VDDMAIN
Do Not Populate
U4
6 1
SCL A0
5 2
SDA A1
8 3
VCC A3
4 7
GND WP
AT24C1024B
ADDR: 0X50
U10
5 8
SI VCC
2 3
SO /WP
6 7
SCK /HOLD
1 4
/CS GND
AT25DF321A-SH-B
Do Not Populate
U13
8 SPI0_MISOC
SI SO
7
SCK GND
6
/RESET VCC
5
/CS /WP
AT45DB321D DNP
Adesto AT25DF Series Devices
SAM4C32-EK [USER GUIDE]
Atmel-11253A-ATARM-SAM4C32-EK-UserGuide_17-Sep-14
R39 R40
0R/DNP 0R/DNP
R45 R46
0R 0R
VDDIN
C80
100nF
VDDIN
AT25DF641A-SH
AT25DF321A-SH
AT25DF161-SH
AT25DF081-SSH
AT25DF021-SH
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