CANpro/104 User Manual

Secondly, the Memory Space can be enabled by Application or Driver software, after the Operating system has started. This can be accomplished by writing a data value to an I/O Space Address which is decoded by the following J3B Jumper settings. Only one byte of the I/O Space is decoded at this I/O Address, and the location is Write Only.

 

J3B

 

I/O Address

Position #5

Position #6

Position #7

 

Removed

Removed

Removed

0x200

Removed

Removed

Installed

0x240

Removed

Installed

Removed

0x280

Removed

Installed

Installed

0x2C0

Installed

Removed

Removed

0x300

Installed

Removed

Installed

0x340

Installed

Installed

Removed

0x380

Installed

Installed

Installed

0x3C0

Table 3

Notes:

1.These I/O address choices do NOT access the CAN Controllers, they are used in Memory Mode to enable the Memory Space address decoding.

2.Writing a data value of 0xA5 will enable the Memory Space, and a data value of 0x5A will disable the Memory Space. All other data values written will be ignored.

3.When the Memory Space is permanently enabled (when J3C-1 is removed), any data value written to the “Memory Enable” I/O address will be ignored.

Base Address Decoding

The CTI CANpro/104 board decodes its Base Address setting (in either Memory or I/O Spaces) by comparing (matching) various Jumper settings with PC/104 Bus Address bits.

If a Jumper is installed, then the corresponding Address Bit will be matched as a logical “1”. If a Jumper is removed, then the corresponding Address Bit will be matched as a logical “0”.

The matching of Jumper settings to Address bits depends on whether the board is operated in Memory or I/O Spaces, and whether PeliCAN or BasicCAN mode is selected.

Jumper

 

Memory Space

I/O Space

Position

Address Bit

Group

Address Bit

 

PeliCAN

BasicCAN

 

 

 

J3A

2

23

X

X

 

3

22

X

X

 

4

19

X

X

 

5

18

X

X

 

6

17

10

10

J3B

1

16

9

9

 

2

15

8

8

 

3

14

X

7

 

4

13

X

6

Table 4

Notes:

CTIM-00043 (0.01) 1/15/2010

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Connect Tech CTIM-00043 user manual Base Address Decoding, Position #5 Position #6 Position #7