PEB20571 INFINEON [Infineon Technologies AG], PEB20571 Datasheet - Page 70

• Manufacturer Part Number: PEB20571
• Description: ICs for Communications
• Manufacturer: INFINEON [Infineon Technologies AG]

3.2.4
A finite state machine in the DELIC controls the VIP S/T line activation/deactivation
procedures and transmission of special pulse patterns. Such actions can be initiated by
primitives (INFOs) on the S/T interface or by C/I codes sent via the mailbox.
Depending on the application mode and the transfer direction, the S/T state machines
support different codes in conditional and unconditional states:
LT-S mode
Codes:
States:
The state diagram is shown in Figure 3-7.
LT-T mode
Codes
Conditional states: power up, pending deactivation, synchronized, slip detected,..
The state diagram is shown in Figure 3-8.
Unconditional states may be entered from any conditional state and should be left with
the command TIM: test mode, reset state,..
The S/T layer-1 activation and deactivation procedures implemented in the DELIC are
similar to the ones implemented in the PEB 2084, QUAT-S.
3.2.4.1
Table 3-5
Command
Deactivate request
Reset
Test mode 1
Test mode 2
Preliminary Data Sheet
S/T State Machine
LT-S Mode
data downstream = Commands: reset, test mode, activate req, ..
data upstream
data upstream
data downstream = Indications: command x acknowledged,..
LT-S State Machine Codes
Abbr.
DR
RES
TM1
TM2
= Indications: not sync, code violation, timer out, ..
deactivated, activated, pending, lost framing, test mode
= Commands: reset, test, activate request,..
Code
0000
0001
0010
0011
3-14
Remark
Initiates a complete deactivation from the
exchange side by transmitting INFO 0 (x)
(x)
Transmission of pseudo-ternary pulses at
2 kHz frequency (x)
Transmission of pseudo-ternary pulses at
96 kHz frequency (x)
Interface Description
DELIC
2003-08