Requirements
2-22
AT91CAP9-STK Starter Kit User Guide
6351B–CAP–27-Jun-08
2.4.1.9
F9: SD Card
The AT91CAP9 MCI is directly connected to the SD Card slot. 68k pull-up resistors are added on the
MCI_DA[0..3] data signals.
The implementation is shown below:
2.4.1.10 F10: Power Supplies and Low-power Mode
0603 footprint (0
Ω
resistor) or jumpers are implemented on power supplies in order to measure the
current.
2.4.1.10.1Power Supplies
Power supply of the board is assumed either by an external 5V/10W AC/DC sector adapter or Li-Ion
external battery (VIN_PMC):
The different power supplies of the board are provided by two AT73C224 chips from the Atmel family of
AT73 products (controlled by the AT91CAP9 TWI bus) and one LTC3412 as shown below:
MCI_DA0
MCI_DA3
MCI_CD
MCI_CDA
MCI_DA2
MCI_DA1
MCI_CK
(PA18/MCI1_D0/ISI_D1)
(PA17/MCI1_CD/ISI_D1)
(PA16/MCI1_CK/ISI_D0)
(PA20/MCI1_D2/ISI_D4)
(PA19/MCI1_D1/ISI_D3)
(PC21/LCDD17/E_TX3)
(PA21/MCI1_D3/ISI_D5)
3V3
3V3
C173
10nF
1
2
J43
FPS009-3202BL
8
5
7
6
4
3
2
1
9
10
11
12
R227
68K
1
8
2
7
3
6
4
5
R135
0R
3V3
R134
3K3_1%
1
2
Q9B
SI5515DC
4
5
3
6
VBAT
D3
MBRS340T3G
2
1
5VDC_SECTOR
+
C56
10UF_16V
1
2
C55
10uF_1210
1
2
R16
10K
5VDC_SECTOR
VIN_PMC
R229
0R