Board Description
AT91SAM9M10-G45-EK User Guide
4-11
6495B–ATARM–21-Apr-10
4.2.6.3
User Serial Com Port
The USART1 is used as a user serial communication port. This USART1 is buffered with an RS-232
Transceiver (TXD, RXD and handshake CTS/RTS control) and connected to the DB-9 male socket. Soft-
ware must assign the appropriate PIO pins (PB5 = RXD1, PB4 = TXD1, PD16 = RTS1, PD17 = CTS1) to
enable the UART1 function.
Figure 4-9.
User Serial Com Port
Refer to the SAM9M10 datasheet for more information about the SAM9M10 USARTs.
4.2.6.4
USB Port
The SAM9M10-G45-EK features USB communication ports:
Two Host Ports: Full speed OHCI and High speed EHCI
One Device Port: High speed.
USB Host Port0 is directly connected to the first UTMI transceiver. The second Host Port (Port1) is mul-
tiplexed with the USB Device High speed and connected to the second UTMI port.
One USB high/full speed type standard A connector
One USB interface Host/Device Micro AB connector
Refer to the SAM9M10 datasheet for detailed programming information.
3
V
3
3
V
3
PB5
PD17
PB4
PD16
R
S
2
3
2 COM PORT
C161
100n
C161
100n
C1+
V+
VCC
C1-
C2+
C2-
V-
T
T
R
R
GND
MN16
ADM
3
202ARNZ
C1+
V+
VCC
C1-
C2+
C2-
V-
GND
MN16
ADM
3
202ARNZ
1
16
3
4
5
15
11
10
12
9
8
1
3
7
14
2
6
C166
100n
C166
100n
C162
100n
C162
100n
C160
100n
C160
100n
J11
J11
5
4
3
2
1
9
8
7
6
10
11
R
8
6
100k
R
8
6
100k
C164
100n
C164
100n
R
8
9
100k
R
8
9
100k
