peb2255 Infineon Technologies Corporation, peb2255 Datasheet - Page 303

• Manufacturer Part Number: peb2255
• Description: E1/t1/j1 Framer And Line Interface Component For Long And Short Haul Applications
• Manufacturer: Infineon Technologies Corporation

ESY…
System Interface Control 3(Read/Write)
Value after RESET: 00
TTRF…
DAF…
Data Sheet
SIC3
7
External Synchronization of DCO2
Together with bit LOOP.SPN the functionality of pin 80 is defined:
Programming of LOOP.SPN and LIM3.ESY and the corresponding
pin function is shown below.
SPN/ESY:
TTR Register Function
Setting this bit the function of the TTR1...4 registers are changed. A
one in each TTR register forces the XSIGM marker high for the
respective time slot and controls sampling of the time slots provided
by pin XSIG. XSIG is selected by LOOP.SPN = 0 and LIM3.ESY = 0.
Disable Automatic Freeze
Significant only if the serial signaling access is enabled.
0…
1…
H
00… function of pin 80 XSIG: If SIC3.TTRF = 1, transmit data
from the system interface. No input function defined for
SIC3.TTRF = 0.
01… function of pin 80 SYNC2: external synchronization input
for the DCO-X circuitry.
10… function of pin 80 ROID: Receive Optical Interface Data.
11… function of pin 80 XSIG: Transmit signaling input from the
transmit system interface.
Signaling is automatically frozen if one of the following alarms
occurred: Loss of Signal (FRS0.LOS), Loss of Frame
Alignment (FRS0.LFA), or receive slips (ISR3.RSP/N).
Automatic freezing of signaling data is disabled. Updating of the
signaling buffer is also done if one of the above described alarm
conditions is active. However, updating of the signaling buffer is
stopped if SIC2.FFS is set.
303
TTRF
FALC-LH V1.3
T1/J1 Registers
DAF
0
PEB 2255
2000-07
(40)