NorthStar HSIO-4 User's & Technical Manual page 58

3.4.2
ARMING THE SYNCHRONOUS DETECT INTERRUPT
North Star HSIO-4
As supplied, the Synchronous Detect
interrupt for each HSIO-4 port is
disarmed. The Synchronous Detect
interrupt can be armed by a mini-jump.
To arm a Synchronous Detect interrupt:
1. Locate the 3-pin jumper area to the right
of the USART for the relevant port, and
install a mini-jump between the center pin and
pin 2.
53
Figure 3-24
User/Technical Manual
'
s y n c d e t e c t
INTERRUPT
JUMPER AREA