PEB2085 SIEMENS [Siemens Semiconductor Group], PEB2085 Datasheet - Page 238

• Manufacturer Part Number: PEB2085
• Description: ISDN SubscribernAccess Controller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

IOF
Note:
Semiconductor Group
These bits together determine the pre-filter delay compensation and the test mode
(layer 1 disabled) of the ISAC-S, as follows:
IOM OFF. Used in terminal mode (SPCR:SPM = 0).
0: IOM interface is operational
1: IOM interface is switched off (DCL, FSC1, IDP0/1, BCL high impedance).
IOF should be set to "1" if external devices connected to the IOM interface should be
"disconnected" e.g. for power saving purposes or for not disturbing the internal IOM
connection between layer 2 and layer 1. However, the internal operation is indepen-
dent of the IOF bit.
TEM
0
0
1
1
PFS
0
1
1
0
Effect
No pre-filter (0 delay)
Pre-filter delay compensation 520 ns
Pre-filter delay compensation 910 ns
Test mode (layer 1 disabled)
238
Register Description