PEB2085 SIEMENS [Siemens Semiconductor Group], PEB2085 Datasheet - Page 239

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

CSEL2-0 Channel Select.
ITF
Note:
4.3.16
Value after reset:
IMS
D2C2-0 Data Strobe Control. Used in IOM-2 mode only.
D1C2-0 These bits determine the polarity of the two independent strobe signals SDS1 and
Semiconductor Group
7
IOM Mode Selection
IOM-2 interface mode is selected when IMS = 1.
SDS2 as follows:
Note: x = 1 for pin SDS1 or 2 for pin SDS2
The strobe signals allow standard combos or data devices to access
a programmable channel.
Additional Feature Register 2
DxC2
0
0
0
0
1
1
1
1
Used in non-terminal mode (SPCR:SPM = 1).
Select one IOM channel out of 8, where the ISAC-S is to receive/transmit.
000 channel 0 (first channel in IOM frame)
001 channel 1
...
111 channel 7 (last channel in IOM frame)
Inter-Frame Time Fill
Selects the inter-frame time fill signal which is transmitted between HDLC frames.
0: idle (continuous 1 s),
1: flags (sequence of patterns: "0111 1110")
In TE and LT-T applications with D-channel access handling (collision resolution),
the only possible inter-frame time fill signal is idle (continuous 1 s). Otherwise the D
channel on the S/T bus cannot be accessed.
IMS
D2C2
00
H
DxC1
0
0
1
1
0
0
1
1
D2C1
D2C0
DxC0
0
1
0
1
0
1
0
1
239
ODS
ADF2
D1C2
SDSx
always low
high during B1
high during B2
high during B1 + B2
always low
high during IC1
high during IC2
high during IC1 + IC2
Read/Write Address 39
D1C1
Register Description
D1C0
0
H