User manual

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.
3V3
3V3
PB5
PD17
PB4
PD16
RS232 COM PORT
C161
100n
C161
100n
C1+
V+
VCC
C1-
C2+
C2- V-
T
T
R
R
GND
MN16
ADM3202ARNZ
C1+
V+
VCC
C1-
C2+
C2- V-
GND
MN16
ADM3202ARNZ
1 16
3
4
5
15
11
10
12
9 8
13
7
14
2
6
C166 100nC166 100n
C162 100nC162 100n
C160
100n
C160
100n
J11J11
5
4
3
2
1
9
8
7
6
10 11
R86
100k
R86
100k
C164
100n
C164
100n
R89
100k
R89
100k