PEF82912FV14XP Lantiq, PEF82912FV14XP Datasheet - Page 74

• Manufacturer Part Number: PEF82912FV14XP
• Manufacturer: Lantiq

Specifications of PEF82912FV14XP

• Number Of Line Interfaces: 1
• Control Interface: HDLC
• Lead Free Status / Rohs Status: Supplier Unconfirmed

A deactivated IOM -2 can be reactivated by one of the following methods:
• Pulling pin DU line low:
• Pulling pin EAW ‘External Awake‘ low
• Setting ‘Configuration Select‘ MODE1:CFS bit = ’0’
• Level detection at the S-interface
• Activation from the U-interface
2.4
The state machine of the U-Transceiver is based on the NT state machine in the PEB /
PEF 8191 documentation [12].
Note: ’Self test request’ and ’Self test passed’ are not executed by the U-transceiver
The U-transceiver is configured and controlled via the registers described in
Chapter
between a state machine that simplifies programming (see
state machine as known from the PEB / PEF 8091 (see
2.4.1
Transmission on the U
is reducing two bits to one quaternary symbol (2B1Q).
Data is grouped together into U-superframes of 12 ms each. Each superframe consists
of eight basic frames which begin with a synchronization word and contain 222 bits of
information. The first basic frame of a superframe starts with an inverted synchword
(ISW) compared to the other basic frames (SW). The structure of one U-superframe is
illustrated in
Figure 32
Data Sheet
<---12 ms--->
ISW
– directly at the IOM -2 interface
– via the µP interface with "Software Power Up" (IOM_CR:SPU bit)
1. Basic Frame
4.11. The U-transceiver is always in IOM -2 channel 0. It is possible to select
U-Transceiver
2B1Q Frame Structure
Figure 32
U-Superframe Structure
2B1Q
and
SW
-interface is performed at a rate of 80 kbaud. The code used
Figure
2. Basic Frame
33.
60
. . .
Chapter
Chapter
SW
Functional Description
2.4.10.2).
PEF 82912/82913
8. Basic Frame
2.4.10.6) and the
2001-03-30