User guide

Evaluation Kit Hardware
Evaluation Kit (EK) User Guide 4-35
11115A–ATARM–27-Jul-11
4.3.3.9 1-Wire EEPROM
The EK board also features a 1-Wire device acting as a “firmware label” to store information like chip
type, manufacturer’s name, production date etc.
Figure 4-28. 1-Wire on EK
4.3.3.10 CAN Bus
Two boards, the SAM9X35-EK and SAM9X25-EK, feature two Controller Area Network (CAN) ports with
transceiver.
CAN0 uses the same IOs (PA9, PA10) as the DBGU. A jumper, JP11, is used to select either of the
interfaces.
 Open JP11 to select the CAN function.
 Close JP11 to select the DBGU function.
A 3-state output buffer, MN19 is inserted in series with the output channels of the CAN transceiver,
which share IOs with the DBGU. This is necessary because the CAN transceiver does not feature
3-state outputs.
Figure 4-29. CAN on EK
R144
1.5k
MN16
DS2431P
I/O
2
GND
1
NC1
3
NC2
4
NC3
5
NC4
6
VDDANA
R145 0R
PB18
ONE_WIRE
(only for SAM9X35/SAM9X25)
VDDIOP0
VDDIOP0
VDDIOP0
VDDIOP0
MN19
SN74LVC1G126DBV
OE
1
A
2
GND
3
Y
4
VCC
5
SEL_CAN
R21 10k
PA5
PA6
R32 10k
CAN1
CAN0
JP7
SIP2
1 2
R20 0R
C24
10u
R33 0R
CANTX0
5V
CANTX1
CANRX0
3V3
C23
100n
R37 0R
JP8
SIP2
1 2
CANRX1
C21
10u
CON3
MJM0606GE06-H
1
2
3
4
5
6
C20
100n
CON2
MJM0606GE06-H
1
2
3
4
5
6
MN5
SN65HVD234DR
RS
8
D
1
EN
5
R
4
CANH
7
CANL
6
VCC
3
GND
2
MN6
SN65HVD234DR
RS
8
D
1
EN
5
R
4
CANH
7
CANL
6
VCC
3
GND
2
3V3
5V
PA10
PA9
R34
120R
R19
120R
R35 10k