(at the network device).
(at the transciever).
96 PIN DIN 41612 FEMALE at the backplane
96 PIN DIN 41612 MALE at the boards.
The ECB-bus was defined in 1984 by the german company KONTRON.
It was defined for the 100x160mm-europa-card and used 2x32 pins of a
3x32-pin-connector (row a and c).
Later the third (middle) row of pins was defined for additional signals
used in 16-bit-systems. This extended bus uses all 3x32pins.
| Pin | Name | Desciption |
| a1 + | 5V + | 5 volts dc |
| a2 D | 5 D | ata line bit 5 |
| a3 | D6 | Data line bit 6 |
| a4 | D3 | Data line bit 3 |
| a5 | D4 | Data line bit 4 |
| a6 | A2 | Address 2 |
| a7 | A4 | Address 4 |
| a8 | A5 | Address 5 |
| a9 | A6 | Address 6 |
| a10 | WAIT/ | CPU wait |
| a11 | BUSRQ/ | bus request |
| a12 | ||
| a13 | ||
| a14 | ||
| a15 | ||
| a16 | ||
| a17 | ||
| a18 | A14 | address 14 |
| a19 | ||
| a20 | M1/ | first cycle |
| a21 | ||
| a22 | ||
| a23 | ||
| a24 | ||
| a25 | ||
| a26 | ||
| a27 | IORQ/ | in/out request |
| a28 | RFSH/ | refresh cycle |
| a29 | A13 | address 13 |
| a30 | A9 | address 9 |
| a31 | BUSAK/ | bus acknowledge |
| a32 | GND | signal ground |
| Pin | Name | Desciption |
| c1 | +5V | +5 volts dc |
| c2 | D0 | Data line bit 0 |
| c3 | D7 | Data line bit 7 |
| c4 | D2 | Data line bit 2 |
| c5 | A0 | Address 0 |
| c6 | A3 | Address 3 |
| c7 | A1 | Address 1 |
| c8 | A8 | Address 8 |
| c9 | A7 | Address 7 |
| c10 | ||
| c11 | IEI | interrupt enable in |
| c12 | ||
| c13 | ||
| c14 | D1 | Data line bit 1 |
| c15 | ||
| c16 | IEO | interrupt enable out |
| c17 | A11 | address 11 |
| c18 | A10 | address 10 |
| c19 | ||
| c20 | NMI/ | not maskable interrupt |
| c21 | INT/ | normal interrupt |
| c22 | WR/ | write cycle |
| c23 | ||
| c24 | RD/ | read cycle |
| c25 | HALT/ | cpu stopped |
| c26 | ||
| c27 | A12 | address 12 |
| c28 | A15 | address 15 |
| c29 | ||
| c30 | MREQ/ | memory request |
| c31 | RESET/ | cpu reset |
| c32 | GND | signal ground |
| Pin | Name | Desciption |
| b1 | +5V | +5 volts dc |
| b2 | A20 | address 20 |
| b3 | A21 | address 21 |
| b4 | A22 | address 22 |
| b5 | A23 | address 23 |
| b6 | D8 | data line bit 8 |
| b7 | D9 | data line bit 9 |
| b8 | D10 | data line bit 10 |
| b9 | D11 | data line bit 11 |
| b10 | D12 | data line bit 12 |
| b11 | D13 | data line bit 13 |
| b12 | D14 | data line bit 14 |
| b13 | D15 | data line bit 15 |
| b14 | IRQ7 | interrupt 7 |
| b15 | IRQ6 | interrupt 6 |
| b16 | IRQ5 | interrupt 5 |
| b17 | IRQ4 | interrupt 4 |
| b18 | IRQ3 | interrupt 3 |
| b19 | IRQ2 | interrupt 2 |
| b20 | IRQ1 | interrupt 1 |
| b21 | IRQ0 | interrupt 0 |
| b22 | IOWR | I/O write |
| b23 | ?? | ?? |
| b24 | IORC | I/O read |
| b25 | MRDC | Mem read |
| b26 | ?? | ?? |
| b27 | MWRC | Mem write |
| b28 | DS0 | Data Select 0 |
| b29 | DS1 | Data Select 1 |
| b30 | OFF | bus driver tristate |
| b31 | LOCK | bus driver tristate disabled |
| b32 | GND | signal ground |
| DS0 | DS1 | Description |
|---|---|---|
| 0 | 0 | data transfer 16-bit |
| 0 | 1 | only bit 0-7 |
| 1 | 0 | only bit 8-15 |
| 1 | 1 | no data transfer |
Note: / = Active Low
| Contributor: | Gerd Wilken |
| Source: | One issue of the magazine computer-technik (c't) in 1984 |
Copyright © The Hardware Book Team 1996-2004.
May be copied and redistributed, partially or in whole, as appropriate.
Document last modified: 2002-01-10