IPAC-X datasheet(87/270 Pages) INFINEON

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IPAC-X

PSB/PSF 21150

Description of Functional Blocks

Data Sheet

2003-01-30

3.5.3.2

States (NT)

G1 Deactivated

The transceiver is not transmitting. There is no signal detected on the S/T-interface, and

no activation command is received in the C/I channel. The clocks are deactivated if the

bit MODE1.CFS to 1. Activation is possible from the S/T interface and from the IOM-2

interface.

G1 I0 Detected

An INFO 0 is detected on the S/T-interface, translated to an “Activation Request”

indication in the C/I channel. The transceiver is waiting for an AR command, which

normally indicates that the transmission line upstream (usually a two-wire U interface) is

synchronized.

G2 Pending Activation

As a result of the ARD command, an INFO 2 is sent on the S/T-interface. INFO 3 is not

yet received. In case of ARL command, loop 2 is closed.

G2 Wait for AID

INFO 3 was received, INFO 2 continues to be transmitted while the transceiver waits for

a “switch-through” command AID from the device upstream.

G3 Activated

INFO 4 is sent on the S/T-interface as a result of the “switch through” command AID: the

B and D-channels are transparent. On the command AIL, loop 2 is closed.

G2 Lost Framing S/T

This state is reached when the transceiver has lost synchronism in the state G3

activated.

G3 Lost Framing U

On receiving an RSY command which usually indicates that synchronization has been

lost on the two-wire U interface, the transceiver transmits INFO 2.

G4 Pending Deactivation

This state is triggered by a deactivation request DR, and is an unstable state. Indication

DI (state “G4 wait for DR”) is issued by the transceiver when:

either INFO0 is received for a duration of 16 ms

or an internal timer of 32 ms expires.

IPAC-X Datasheet(PDF) 87 Page - Infineon Technologies AG