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Atmel SMART SAM4C Series User Manual page 11

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Figure 3-6.
Power Rails Schematic
Note:
Test points and jumpers are provided for easy access to each of the regulated power lines and measure the current on
each line.
3.3.6
Battery Backup
The VDDBU pin is powered from the 3.3V rail or from a backup battery BT1 via a dual Schottky diode D4.
Test points TP8 and jumper JP8/JP10 are used to perform voltage and current measurements.
Figure 3-7.
Backup Battery Schematic
3.4
Embedded Memories
I2C for data storage in EEPROM (Atmel AT24C1024B)
SPI Serial Flash AT45 or AT25F
3.4.1
TWI EEPROM
The AT24C1024B provides 1,048,576 bits of serial electrically erasable and programmable read-only memory
(EEPROM) organized as 131,072 words of 8 bits each.
Device slave address byte: 0x50.
11
SAM4C32-EK [USER GUIDE]
Atmel-11253A-ATARM-SAM4C32-EK-UserGuide_17-Sep-14
5V
R14
R14
Ω
100K
6
5
4
Q1
Q1
JP9
JP9
Si1563EDH
Si1563EDH
C36
C36
100nF
FORCE
POWER
1
2
3
C43
C43
FORCE_ON
ON
R19
R19
15pF
Ω
10K
Ω
R20
R20
10K
{3}
SHDN
TP5
TP5
VDDOUT
JP6
JP6
TP6
TP6
L2 L2
JP7
JP7
56µH
R13
R13
C33
C33
C32
C32
2.2R
.
2.2µF/DNP
100nF
100nF
Do Not Populate
C34
C34
22µF
22
close to SAM4C32
VDDBU
JP8
TP8
C40
2.2µF
3V3
R15
R15
100K Ω
100
FORCE_ON
U2 RT9018A
U2 RT9018A
1
5V
PGOOD
GND
2
EN
ADJ
3
VIN
VOUT
4
VDD
NC
C38
C38
C37
C37
1µF
10µF
C44
C44
V
= 0.8 x (1 + R
/R
1µF
out
top
bottom
3V3 POWER
VDDCORE
3V3
VDDPLL
D4
D4
VDDIN
BAT54C
BAT54C
1
3
2
JP10
VBATT
VDDBU
TP7
3V3
C35
C35
10nF
8
47K Ω 1%
R16
7
R17
6
470Ω
5
D5
R18
C41
15 15K Ω 1%
C39
1µF
10µF
RED
RED
Power LED
)
TP10
TP10
VDDMAIN
JP11
JP11
TP11
TP11
VDDIN
JP12
JP12
TP12
TP12
VDDIO
JP13
JP13
BT1
C42
100nF

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