Atmel AT91SAM9G45-EKES User Manual page 19

Board Description
4.2.6.3 User Serial Com Port
The USART1 is used as a user serial com 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. Software must
assign the appropriate PIO pins (PB5 = RXD1, PB4 = TXD1, PD16 = RTS1, PD17 = CTS1) to enable the
UART1 function.
Figure 4-8.
Refer to the SAM9G45 datasheet for more information about the SAM9G45 USARTs.
4.2.6.4 USB Port
The SAM9G45-EKES 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 SAM9G45 datasheet for detailed programming information.
4-10
6481B–ATARM–27-Nov-09
User Serial Com Port
3V3
R79 R79 R81 R81
100K 100K 100K 100K
PB4
PD16
PB5
PD17
3V3
MN17 MN17
1 16
1 + 1 + V V
C152 C152 C154 C154
100nF 100nF 100nF 100nF
15
3 G N D G N D
4 1 - 1 - 2
C157 C157
2 + 2 + V + V +
C159 C159 100nF 100nF
100nF 100nF
C161 C161
5 6 100nF 100nF
2 - 2 - V - V -
11 14
T T
10 7
T T
12 13
R R
9 8
R R
ADM3202ARNZ ADM3202ARNZ
RS232 COM PORT
MALE RIGHT ANGLE MALE RIGHT ANGLE
1
6
2
7
3
8
4
9
5
J11 J11
AT91SAM9G45-EKES User Guide