Abaco® I/O BUS is a low cost system
for expanding the CPU cards resources of Abaco® family.
This BUS is located on a 26 pins connector along with power supplies
(See the Application
Note). This kind of BUS has been mainly designed
for managing the I/O resources in a addressing field of
256 Bytes max. By means of this simple BUS it is possible
to get ready control structures by connecting the peripheral BLOCK cards for DIN rails.
By using ABB05
or ABB03 cards
it is also possible to have Abaco® I/O BUS
connected to the Single Europe Size cards. When PCC
A26 card is used, it is possible to drive the Abaco®
I/O BUS through a standard PC by using the Centronics
interface of which it is equipped with.
D0 >----------1--> O O <--2----------< D1
D2 >----------3--> O O <--4----------< D3
D4 >----------5--> O O <--6----------< D5
D6 >----------7--> O O <--8----------< D7
A0 >----------9--> O O <--10---------< A1
A2 >--------11--> O O <--12--------< A3
A4 >--------13--> O O <--14--------< A5
A6 >--------15--> O O <--16--------< A7
/WR >--------17--> O O <--17---------< /RD
/IORQ >---------19--> O O <--20-------< /RESET
/ECS1 >--------21--> O O <--22-------< /ECS2
/INT >----------23--> O O <--24--------< /NMI
GND >--------25--> O O <--26---------< Vcc
Signals on the 26 pins connector for Abaco® I/O BUS
Page up-dated at February 02, 2004
