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

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:

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