PEB2447 SIEMENS [Siemens Semiconductor Group], PEB2447 Datasheet - Page 36

• Manufacturer Part Number: PEB2447
• Description: Memory Time Switch Extended Large MTSXL
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Semiconductor Group
4.5
Access in demultiplexed P-interface mode:
Read, address:
Reset value:
FEC
PC
IR
PFI
Any interrupt will activate the INT line if it is not masked. All interrupt bits and the INT line
are reset when reading ISTA.
Note 1: All interrupts and the INT line are cleared with reset.
Note 2: If the SP signal is repeated within a multiple of frame length
Note 3: During selftest no PFI interrupt will occur.
(e.g. 2
– the MTSXL works correctly because the internal counters run autonomously
– the PFI interrupt does not occur because this situation is internally handled as
Interrupt Status Register (ISTA)
and are synchronized within correct phase.
“loss of synchronization” and this situation does not change.
Bit 7
0
or 4
Frame Evaluation Completed; the indirect register FER contains a
valid offset and can be read.
Procedure Completed; the procedure started from the command
register (CM reset or MTSXL selftest) is finished.
Initialization Request. The connection memory has to be
programmed due to a loss of data (IR = 1). The IR bit is set after
power failure or inappropriate clocking. It can only be retriggered
again after a selftest or CM reset procedure.
PCM Framing Interrupt; this bit being logical 1 indicates the loss or
gain of synchronization. Synchronization is considered lost by the
MTSXL if the SP signal is not repeated within the correct period.
Synchronization is considered achieved, if two consecutive SP
pulses with the correct period have been received.
0
125 s) but at correct phase:
0
02
00
H
H
0
36
FEC
PC
Detailed Register Description
IR
Bit 0
PFI
PEB 2447
03.97