PEF 82912 F V1.4 Infineon Technologies, PEF 82912 F V1.4 Datasheet - Page 109

• Manufacturer Part Number: PEF 82912 F V1.4
• Description: IC MODULAR ISDN NT INTELL TQFP64
• Manufacturer: Infineon Technologies
• Series: Q-SMINT®r

Specifications of PEF 82912 F V1.4

• Function: Second Generation Modular
• Interface: ISDN
• Mounting Type: Surface Mount
• Package / Case: 64-LFTQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -
• Voltage - Supply: -
• Power (watts): -
• Operating Temperature: -
• Number Of Circuits: -
• Other names: PEF82912FV1.4XT; PEF82912FV14XP; SP000007558; SP000007559

Synchronized 2
In this state the U-transceiver has received UOA = 1. This is a request to activate the
downstream device.
Test
The test signal SP is issued as long as C/I=SSP is applied. For further details see
Table
Transparent
This state is entered upon the detection of ACT = 1 received from the LT-side and
corresponds to the fully active state.
Wait for ACT
Upon the receipt of AI, the NT waits for a response (ACT = 1) from the LT-side.
Wait for SF
The signal SN2 is sent on the U-interface and the receiver waits for detection of the
superframe.
Wait for SF AL
This state is entered in the case of an analog loop-back and allows the receiver to update
the AGC, to recover the timing phase, and to update the EQ-coefficients.
2.4.10.6 Simplified NT State Machine
As an alternative to the activation/deactivation state machine of the U-transceiver known
from the IEC-Q [9], a more software friendly state machine can be selected.
In the early days of ISDN, the activation and deactivation procedure in a NT was
completely determined by the U- and S-transceiver state machines without a
microcontroller being necessary. Intelligent NTs or U-terminals require a microcontroller
and software. In this case the software controls both the S-and the U-transceiver state
machine.
The simplified U-transceiver state machine was developed to better address the needs
and requirements of software running on the microcontroller. The simplified state
machine offers the following advantages:
– the software can tell whether the IOM -2 clocks are active or powered down via the
– From the received C/I code the software always knows, what it is expected to do and
Data Sheet
received C/I code
what options it has. The software does not have to backtrack older C/I codes.
24.
95
Functional Description
PEF 82912/82913
2001-03-30