PEB 2091
PEF 2091
Programming
6.7
Examples for Activating Test Loop-Backs
Examples for Analog Loop-Back Control
6.7.1
The examples below demonstrate the use of loop-backs #1 and #3.
Loop-back #1 (LT side)
NT
LT
<––––– C/I DC
(1111B)
(1000B)
C/I DI
(1111B) –––––>
C/I ARL
C/I AR
(1010B) <––––– ; Close loop-back #1
(1000B) –––––> ; Activation proceeds in NT
(1001B) –––––> ; and LT
<––––– C/I AR
C/I ARM
C/I UAI
(0111B) –––––> ; Activation complete,
; #1 closed
C/I RES
(0001B) <––––– ; Open loop-back #1,
; reset the IEC-Q
Loop-back #3 (NT side)
For correct operation of this example it is assumed that the IEC-Q is not in the
power-down mode, i.e. FSC and DCL are present.
.
NT
LT
C/I RES
C/I DR
(0001B)
(0000B)
C/I DI
(1111B) –––––> ; NT in "Test" state
–––––>
<–––––
C/I ARL
C/I DC
C/I AR
(1010B)
(1111B)
(1000B)
; Close loop-back #3
–––––>
<–––––
<–––––
; NT act. complete, #3 closed
; Open #3 and reset NT
C/I RES
(0001B)
–––––>
Semiconductor Group
236
Data Sheet 01.99
INFINEON [ Infineon ]
