PEB 2091
PEF 2091
Operational Description
4.3.5
Partial Activation (U Only)
The IEC-Q is in the "Synchronized 1" state (see "State Machine in NT Modes", page 160)
after a successful partial activation. IOM®-2-clocks DCL and FSC are issued. On DOUT
the C/I-message "DC" as well as the LT user data is sent.
While the C/I-messages "DI" (1111B) or "TIM" (0000B) are received on DIN, the IEC-Q
will transmit "SAI" = (0) upstream. Any other code results in "SAI" = (1) to be sent. On
the U-interface the signal SN3 (i.e. 2B + D = (1)) will be transmitted continuously
regardless of the data on received from the downstream side.
The LT will transmit all user data transparently downstream (signal SL3T). In case the
last C/I command applied is "UAR", the LT retains activation control when an activation
request comes from the terminal (confirmation with C/I = "AR" required, see page 132
(case 1)). With C/I "DC" applied from the upstream device, TE initiated activations will be
completed without the necessity of an exchange confirmation (page 133 (case 2)).
S/T
IOM R -2
U-Reference Point
IOM R -2
INFO 0
INFO 0
DC
DI
SL0
SN0
DC
DI
UAR
TL
PU
DC
TN
AR
SN1
SN0
SL1
SL2 act= 0 dea=1 uoa= 0
SN2
ARM
SN3 act = 0 sai = 0
ꢅ
SL3T act= 0 dea=1 uoa=1
UAI
(DC)
R
SBCX
IEC-Q
IEC-Q
EPIC
NT
LT
ITD04245
Figure 57
U Only Activation
Semiconductor Group
130
Data Sheet 01.99
INFINEON [ Infineon ]
