CANpro/104 User Manual
9
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CTIM-00043 (0.01) 1/15/2010
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1.
X = Address bit is ignored (and the corresponding Jumper is Not Used).
2.
When Memory Space is selected, PC/104 Address bits 20 and 21 are
always
decoded as logical
“0”
.
To determine which Jumpers to install and which to remove, the desired Address needs to be broken down
into a
binary
number, all the Jumpers that correspond to “1-bits” must be installed, and all Jumpers
corresponding to “0-bits” must be removed.
The remaining
lower bits
of the PC/104 Bus Address are either, ignored, or are used to select and address the
Registers of the SJA1000 CAN controllers, in the following manner.
When Memory Space is selected
PC/104 Bus
Address Bit
SJA1000 Selection
or Register Address Bit
12
Address bit is ignored
11
Address bit is ignored
10
Address bit is ignored
9
Address bit is ignored
8
Address bit is ignored
7
Select SJA1000 device
=0, selects the CAN-0 Port
=1, selects the CAN-1 Port
6
6
5
5
4
4
3
3
2
2
1
1
0
0
Table 5
When I/O Space is selected
PC/104 Bus
Address Bit
SJA1000 Selection
or Register Address Bit
PeliCAN Addressing Mode
BasicCAN Addressing Mode
10
Decoded (see Table 4)
Decoded (see Table 4)
9
Decoded (see Table 4)
Decoded (see Table 4)
8
Decoded (see Table 4)
Decoded (see Table 4)
7
Select SJA1000 device
=0, selects the CAN-0 Port
=1, selects the CAN-1 Port
Decoded (see Table 4)
6
6
Decoded (see Table 4)
5
5
Select SJA1000 device
=0, selects the CAN-0 Port
=1, selects the CAN-1 Port
4
4
4
3
3
3
2
2
2
1
1
1
0
0
0
Table 6