![](http://pdfasset.owneriq.net/c/21/c21ccf4a-5d9f-44f8-90cf-5c8615cb77a2/c21ccf4a-5d9f-44f8-90cf-5c8615cb77a2-bg6.png)
Master/slave
configuration jumpers
Circuit board
Pin 1
Pin 20 removed for keying
Drive is master; no slave present
Drive is master; Seagate slave drive present
Drive is slave; Seagate master drive present
Reserved positions (do not use)
Note. Drive is shown with
circuit board up.
A C
B D
Figure 1. AT interface cable connector and master/slave
configuration jumpers
4 ST9235 Family Installation Guide, Rev. B