PEF20550HV2.1XT Infineon Technologies, PEF20550HV2.1XT Datasheet - Page 257
PEF20550HV2.1XT
Manufacturer Part Number
PEF20550HV2.1XT
Description
Manufacturer
Infineon Technologies
Datasheet
1.PEF20550HV2.1XT.pdf
(407 pages)
Specifications of PEF20550HV2.1XT
Lead Free Status / Rohs Status
Compliant
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Tristate Behavior at the Configurable Interface
The downstream control memory code field, together with the CSCR and OMDR
registers also defines the state of the output driver at the downstream CFI ports.
Unassigned channels (code ‘0000’) are set to the inactive state. Subchannels (codes
‘0010’ to ‘0111’) are only active during the sub-timeslot position specified in CSCR. The
OMDR:COS bit selects between tristate outputs and open drain outputs:
Table 41
Tristate/Open Drain Output Characteristics at the CFI
Logical State
Logical 0
Logical 1
Inactive
1)
Figure 91 illustrates this behavior in case of tristate outputs:
Figure 91
Tristate Behavior at the CFI
Semiconductor Group
An external pull-up resistor is required to establish a high voltage level.
CFI Time-Slot #
CM Data Field
CM Code Field
DD #
High Z
1 -
0 -
X X X X X X X X
0
Unassigned
Channel
0
N
0
Tristate Outputs
Low voltage level
High voltage level
High impedance
0
(Switched from PCM)
64 kbps Channel
0
Pointer to DM
0
N+1
257
0
1
CSCR : SC#1..#0 = 01
(Switched from PCM)
16 kbps Channel
0
Pointer to DM
1
N+2
1
Open Drain Outputs
Low voltage level
Not driven
Not driven
0
1
µP Channel
(Always 64 kbit/s)
1
0
Application Hints
1)
1)
1
0
N+3
1
0
0
PEB 20550
PEF 20550
0
ITD08070
1
1
0
01.96
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