PEB20591HV22XP Lantiq, PEB20591HV22XP Datasheet - Page 39

• Manufacturer Part Number: PEB20591HV22XP
• Manufacturer: Lantiq

Specifications of PEB20591HV22XP

• Control Interface: HDLC
• Lead Free Status / Rohs Status: Supplier Unconfirmed

PRELIMINARY
3.4.1
3.4.1.1
On the ISDN line side of the VIP, data is ternary coded. Since the VIP contains logic to
detect the level of the signal, only the data value is transferred via IOM-2000 to DELIC.
U
In U
S/T Mode
In S/T mode, data and control information is sent via IOM-2000 data interface. Every
data bit has a control bit associated with it. Thus, for each S/T line signal, 2 bits are
transferred via DX and DR. Bit0 is assigned to the user data, and bit1 carries control
information.
Table 8
ctrl (bit1) data (bit0) Function
0
0
1
1
Table 9
ctrl (bit1) data (bit0) Function
0
0
1
1
Note: ’data’ is always transmitted prior to ’ctrl’ via DX/DR lines (refer to
Data Sheet
PN
PN
Mode
mode, only data is sent via the IOM-2000 data interface.
IOM-2000 Frame Structure
Data Interface
0
1
0
1
0
1
0
1
Control Bits in S/T Mode on DR Line
Control Bits in S/T Mode on DX Line
Logical ’0’ received on line interface
Logical ’1’ received on line interface
Received E-bit = inverted transmitted D-bit (E=D) (LT-T only)
F-bit (Framing) received; indicates the start of the S frame
Logical ’0’ transmitted on line interface
Logical ’1’ transmitted on line interface
not used
F-bit (Framing) transmitted; indicates the start of the S frame
31
Interface Description
Figure
PEB 20590
PEB 20591
2001-03-01
21).