peb20560 Infineon Technologies Corporation, peb20560 Datasheet - Page 412

• Manufacturer Part Number: peb20560
• Description: Dsp Oriented Pbx Controller Doc
• Manufacturer: Infineon Technologies Corporation

9
9.1
This standardized interface for interchip communication in ISDN line cards for digital
exchange systems was developed by the “Group of Four” (ALCATEL, Siemens, Plessey
and ITALTEL systems companies).
The IOM-2 interface is a four-wire interface with a bit clock, a frame clock and one data
line per direction. It has a flexible data clock. This way, data transmission requirements
are optimized for different applications.
Figure 9-1
9.1.1
FSC
DCL
DD
DU
MONITOR
D
C/I
MR
MX
Semiconductor Group
FSC
DCL
DU
DD
IOM
IOM
Appendix
IOM
Signals / Channels
R
R
CH0
CH0
B1
IOM
Frame Synchronization Clock, 8 kHz
®
Data Clock, 2.048 or 4.096 MHz
Data Downstream, 2.048 Mbit/s (4.096 Mbit/s)
Data Upstream, 2.048 Mbit/s (4.096 Mbit/s)
Monitor Channel
Signaling Channel, 16 kbit/s
Command/Indication Channel
Monitor Receive handshake signal
Monitor Transmit handshake signal
-2 Interface
®
CH1
CH1
-2 Interface with 4-bit C/I Channel
CH2
CH2
B2
CH3
CH3
125
MONITOR
s µ
9-1
CH4
CH4
CH5
CH5
D
C/I
CH6
CH6
M M
R X
CH7
CH7
PEB 20560
Appendix
CH0
CH0
ITD04319
2003-08