5.1.2Signal assignment on the connector
Table 5.1 shows the signal assignment on the interface connector.
Table 5.1 Signal assignment on the interface connector
Pin No.  | Signal  | Pin No.  | Signal  | 
  | 
  | 
  | 
  | 
1  | RESET–  | 2  | GND  | 
3  | DATA7  | 4  | DATA8  | 
5  | DATA6  | 6  | DATA9  | 
7  | DATA5  | 8  | DATA10  | 
9  | DATA4  | 10  | DATA11  | 
11  | DATA3  | 12  | DATA12  | 
13  | DATA2  | 14  | DATA13  | 
15  | DATA1  | 16  | DATA14  | 
17  | DATA0  | 18  | DATA15  | 
19  | GND  | 20  | (KEY)  | 
21  | DMARQ  | 22  | GND  | 
23  | 24  | GND  | |
25  | 26  | GND  | |
27  | IORDY,   | 28  | CSEL  | 
29  | DMACK–  | 30  | GND  | 
31  | INTRQ  | 32  | IOCS16–  | 
33  | DA1  | 34  | PDIAG–  | 
35  | DA0  | 36  | DA2  | 
37  | CS0–  | 38  | CS1–  | 
39  | DASP– | 40  | GND | 
  | 
  | 
  | 
  | 
[signal]  | [I/O]  | [Description]  | 
RESET– | I  | Reset signal from the host. This signal is low active and is asserted  | 
  | 
  | for a minimum of 25 μs during power on.  | 
DATA   | I/O  | |
  | 
  | These signals are used for data transfer  | 
I  | IOW– is the strobe signal asserted by the host to write device  | |
  | 
  | registers or the data port.  | 
  | 
  | IOW– shall be negated by the host prior to initiation of an Ultra  | 
  | 
  | DMA burst. STOP shall be negated by the host before data is  | 
  | 
  | transferred in an Ultra DMA burst. Assertion of STOP by the host  | 
  | 
  | during an Ultra DMA burst signals the termination of the Ultra DMA  | 
  | 
  | burst.  | 
5 - 3  |