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Board Description
4.2.10
Serial Peripheral Interface Controller (SPI)
The SAM9M10 provides two high-speed Serial Peripheral Interface (SPI) controllers. One port is used to
interface with the on-board serial DataFlash ? .
Figure 4-15. SPI
3 V 3
(test points)
1
DNP
JP11
3
R67
470k
3 V 3
MN1 3
PB0
PB1
PB2
PB 3
( S PI0_MI S O)
( S PI0_MO S I)
( S PI0_ S PCK)
( S PI0_NPC S 0)
1
JP12
2
8
1
2
4
S O
S I
S CK
C S
VCC
GND
6
7
C124
100n
S IP2
NR S T
3
RE S ET
WP
5
S ERIAL DATAFLA S H
R6 8
0R
DNP
4.2.11
Two Wire Interface (TWI)
The SAM9M10 has a full speed (400 kHz) master/slave I2C Serial Controller. The controller is fully com-
patible with the industry standard I2C and SMBus Interfaces. This port is used to interface with the on-
board Serial EEPROM, ISI and TV encoder interface.
Figure 4-16. TWI
3 V 3
R66
10k
MN12
PA21
PA20
(TW CK0)
(TW DO)
3 V 3
6
5
8
S CL
S DA
VCC
A0
A1
A 3
1
2
3
JP1 3
C125
100n
S IP2
4
GND
WP
7
S ERIAL EEPROM
4.2.12
SD/MMC Interface
The SAM9M10-G45-EK has two high-speed 8-bit multimedia interfaces MMC/MMCPlus v4.1. The first
interface is used as an 8-bit interface (MCI1), connected to a CE-ATA connector footprint and an 8-bit
SD/MMC card slot. The second interface is used as a 4-bit interface (MCI0), connected to a 4-bit
SD/MMC card slot.
The users must provide their own compatible cards for use with these connectors.
Please note that the power is connected to VCC, which is 3.3 volts.
AT91SAM9M10-G45-EK User Guide
4-19
6495B–ATARM–21-Apr-10
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