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PEF82913 bảng dữ liệu(PDF) 64 Page - Infineon Technologies AG

tên linh kiện PEF82913
Giải thích chi tiết về linh kiện  2B1Q Second Gen. Modular ISDN NT
PDF  240 Pages
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nhà sản xuất  INFINEON [Infineon Technologies AG]
Trang chủ  http://www.infineon.com
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PEF82913 bảng dữ liệu(HTML) 64 Page - Infineon Technologies AG

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PEF 82912/82913
Functional Description
Data Sheet
50
2001-03-30
•
Figure 24
MONITOR Interrupt Structure
2.3.4
C/I Channel Handling
The Command/Indication channel carries real-time status information between the Q-
SMINT®I and another device connected to the IOM®-2.
1) C/I0 channel lies in IOM®-2 channel 0 and access may be arbitrated via the TIC bus
access protocol. In this case the arbitration is done in IOM®-2 channel 2.
The C/I0 channel is accessed via register CIR0 (received C/I0 data from DD) and
register CIX0 (transmitted C/I0 data to DU). The C/I0 code is four bits long.
In the receive direction, the code from layer-1 is continuously monitored, with an interrupt
being generated any time a change occurs (ISTA.CIC).
C/I0 only: a new code must be found in two consecutive IOM®-2 frames to be considered
valid and to trigger a C/I code change interrupt status (double last look criterion).
In the transmit direction, the code written in CIX0 is continuously transmitted in C/I0.
2) A second C/I channel (called C/I1) lies in IOM®-2 channel 1 and is used to convey real
time status information of the on-chip S-transceiver or an external device. The C/I1
channel consists of four or six bits in each direction. The width can be changed from 4
bit to 6 bit by setting bit CIX1.CICW.
CIC
ST
MOS
S
WOV
INT
ISTA
CIC
ST
MOS
S
WOV
U
U
MASK
MRE
MDR
MIE
MDA
MER
MAB
MOSR
MOCR
0
1
1
0



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