PEB 2091
PEF 2091
Functional Description
The IOM®-2 signals are:
DIN, DOUT
DCL
256 kbit/s
512 kHz
8 kHz
FSC
125 µs
FSC
IOM R Channel 0
M M
DD
DU
B1
B1
B2
B2
MONITOR
MONITOR
D
C/I
C/I
R
X
M M
D
R
X
ITD09788
Figure 26
Plain Frame Structure of the IOM®-2 Interface
3.6.1.3 Terminal Timing Mode
Note 13: This timing applies to the TE and the COT-1536 modes.
In the terminal timing mode the IEC-Q provides a data clock DCL with a frequency of
1536 kHz. As a consequence the IOM®-2 interface provides three channels each with a
nominal data rate of 256 kbit/s.
• Channel 0 contains 144 kbit/s (for 2B+D) plus Monitor and Command/Indication
channels for the layer-1 device.
• Channel 1 contains two 64-kbit/s intercommunication channels plus Monitor and
Command/Indication channels for other IOM®-2 devices.
• Channel 2 is used for IOM®-2 bus arbitration (access to the TIC bus). Only the
Command/Indication bits are used in channel 2.
Note 14: Channels 1 and 2 can be used only in the TE mode. The description
above for these two channels doesn’t apply to the COT-1536 mode.
Note 15: Channel 0 is called the ’active channel’ of the IEC-Q. Channels 1 and 2 are
called the ’passive channels’ of the IEC-Q.
The IOM®-2 signals are:
DIN, DOUT
DCL
768 kbit/s
1536 kHz output
8 kHz output
FSC
Semiconductor Group
73
Data Sheet 01.99
INFINEON [ Infineon ]
