PSB21384H-V13 Infineon Technologies, PSB21384H-V13 Datasheet - Page 70
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PSB21384H-V13
Manufacturer Part Number
PSB21384H-V13
Description
Manufacturer
Infineon Technologies
Datasheet
1.PSB21384H-V13.pdf
(270 pages)
Specifications of PSB21384H-V13
Number Of Line Interfaces
1
Control Interface
HDLC
Lead Free Status / Rohs Status
Compliant
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2.2.5
The Command/Indication channel carries real-time status information between the
SCOUT and another device connected to the IOM.
1) One C/I channel (called C/I0) conveys the commands and indications between the
layer-1 and the layer-2 parts of the SCOUT. It can be accessed by an external layer-2
device e.g. to control the layer-1 activation/deactivation procedures. C/I0 channel
access may be arbitrated via the TIC bus access protocol. In this case the arbitration is
done in C/I channel 2 (see figure 20).
The C/I0 channel is accessed via register CIR0 (in receive direction, layer-1 to layer-2)
and register CIX0 (in transmit direction, layer-2 to layer-1). The C/I0 code is four bits
long. A listing and explanation of the layer-1 C/I codes can be found in chapter 2.3.7.1.3
and 2.3.7.1.5. In the receive direction, the code from layer-1 is continuously monitored,
with an interrupt being generated anytime a change occurs (ISTA.CIC). A new code
must be found in two consecutive IOM 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) can be used to convey real time status information
between the SCOUT and various non-layer-1 peripheral devices e.g. PSB 2161
ARCOFI-BA. The C/I1 channel consists of four or six bits in each direction.The width can
be changed from 4bit to 6bit by setting bit CIX1.CICW.
The C/I1 channel is accessed via registers CIR1 and CIX1. A change in the received
C/I1 code is indicated by an interrupt status without double last look criterion.
2.2.5.1
Figure 37 shows the CIC interrupt structure.
A CIC interrupt may originate
– from a change in received C/I channel 0 code (CIC0)
– from a change in received C/I channel 1 code (CIC1).
The two corresponding status bits CIC0 and CIC1 are read in CIR0 register. CIC1 can
be individually disabled by clearing the enable bit CI1E in the CIX1 register. In this case
the occurrence of a code change in CIR1 will not be displayed by CIC1 until the
corresponding enable bit has been set to one.
Bits CIC0 and CIC1 are cleared by a read of CIR0.
An interrupt status is issued every time a valid new code is loaded into CIR0 or CIR1.
The CIR0 is buffered with a FIFO size of two. If a second code change occurs in the
received C/I channel 0 before the first one has been read, immediately after reading of
CIR0 a new interrupt will be generated and the new code will be stored in CIR0.
Data Sheet
or
C/I Channel Handling
CIC Interrupt Logic
60
PSB 21381/2
PSB 21383/4
Interfaces
2001-03-12
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