Atmel AT91SAM7A2-EK, Руководство пользователя

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AT91SAM7A2-EK Evaluation Board User Guide 3-3
6115B–ATARM–10-May-05
Figure 3-1. Female DB9 Connector
The CAN3 module is connected to a male subD9 connector (J7) via the CAN driver
MN5. The pinout is described in Table 3-3.
The CAN bus resistive load is 60 Ohm. It is made up of two 120 Ohm resistors in paral-
lel. The recommended CAN bus load is 60 Ohm. Depending on the external input bus
resistor, users can disconnect resistors to achieve the correct bus load.
3.7 LIN Buses and
RS-232 Lines
Via USART modules, the AT91SAM7A2-EK board provides the following:
!
Two LIN buses
!
One RS-232 line
Table 3-2. Pinout
SubD9 Pin Function
4 CAN-L
3 GND
8 CAN-H
others Not connected
Table 3-3. Pinout
SubD9 Pin Function
2 CAN-L
3 GND
7 CAN-H
others Not connected
1 2 3 4 5
6 7 8 9
Table 3-4. Communication Peripherals
Peripheral Connector Driver
USART0 J8 (male DB9) or
J4 (3 points)
RS-232 driver (MN6)
LIN driver (MA5)
USART1 J19 (3 points LIN driver (MA6)
CAN0 J2 (5 x 2 connector on a 0.1”
(2.54 mm) pitch)
CAN driver (MN2)
CAN1 J6 (female DB9) CAN driver (MN4)
CAN2 J5 (female DB9) CAN driver (MN3)
CAN3 J7 (male DB9) CAN driver (MN5)