psb21391 Infineon Technologies Corporation, psb21391 Datasheet - Page 83

• Manufacturer Part Number: psb21391
• Description: Siemens Codec With Upn Transceiver
• Manufacturer: Infineon Technologies Corporation

Analog Loop 3 Activated
After recognition of the looped back info 3 the channels are looped back transparently.
Test Mode i
After entering test mode initiated by SCP-, SSP-commands.
Level Detect, Resynchronization
During the first period of receiving info 2 or under severe disturbances on the line the U
receiver recognizes the receipt of a signal but is not (yet) synchronized. In extremely rare
situations of severe line disturbances, the U
state. To avoid this, it is recommended that the software issues an RES command to
restart activation if SCOUT-P(X) remains in this state longer than an acceptable period.
This timeout period should be at least 110 ms, but the exact period should be chosen by
the user based on system concerns.
Loop 2
The states for loop 2 are identical to the states of the regular TE operation. The loop 2
indications are output if the S-bit of the U
State
Synchronized
Activated
Reset state
A software reset (RES) forces the SCOUT-P(X) to an idle state where INFO 0 is
transmitted. Thus activation from the NT is not possible. Clocks are still supplied.
Data Sheet
S-bit = 0
AR
AI
PN
73
frame is ‘1’.
PN
receiver might become locked in this
S-bit = 1
ARL2
AIL2
PSB 21391
PSB 21393
Interfaces
2001-03-07
PN