User's Manual

Page 3–19
18 September 2007
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
eNfusion™ HSD-128 High-speed Data Terminal
5. System Configuration Pin Strapping – Stand-Alone
The HSD adjusts its configuration according to the status of several strap pins
on the rear ARINC 600 connector.
Configuration pins are assigned based on system mode configuration
selection and data input/output (I/O) requirements, as shown in
Table 3–6.
Detailed pin assignment is shown in Table 3–7 and Table 3–8.
Note: The logic for the System Configuration pins is reverse to the logic
explained in ARINC 741 Characteristic Attachment 1-4, Note 19. For
System Configuration pins, 0=strapped to common and 1=open.
• Pins marked “0” are signaled by strapping to “Fwd Address
Common” (T7K).
• Pins marked “1” are signaled by an open circuit—no connection.
• Configurations resulting in all “1’s” are invalid.
6. System Mode Strap Pins Coding – Stand-Alone
The HSD must be externally strapped according to its intended operational
configuration mode.
Table 3–7 illustrates the system pin strapping for all HSD
operational modes and configurations. The system pin strapping for
Stand-Alone Mode is highlighted.
Table 3–6. Configuration Pin Summary – Stand-Alone
Pin # Name Function
TP4A to D System Config #1 to #4 System Mode (coded)
TP4E to H System Config #5 to #8 Not assigned (set to"1")
MP5G to K Data I/O Config #1 to #4 NOTE: Data I/O Mode (coded)
MP6G to K Data I/O Config #5 to #8 Not assigned (set to"1")