AT91SAM7A2-EK Atmel, AT91SAM7A2-EK Datasheet - Page 13

• Manufacturer Part Number: AT91SAM7A2-EK
• Description: BOARD EVAL FOR AT91SAM7A2
• Manufacturer: Atmel
• Series: AT91SAM Smart ARMr
• Type: ARM7 Processor, Microcontrollerr

Specifications of AT91SAM7A2-EK

• Contents: Evaluation Board, Parallel Cable and CD-ROM
• Processor To Be Evaluated: AT91SAM7A2
• Data Bus Width: 32 bit
• Interface Type: RS-232
• For Use With/related Products: AT91SAM7A2
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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