peb2256 Infineon Technologies Corporation, peb2256 Datasheet - Page 46

• Manufacturer Part Number: peb2256
• Description: E1/t1/j1 Framer And Line Interface Component For Long And Short Haul Applications
• Manufacturer: Infineon Technologies Corporation

Table 4
Pin
No.
60
61
62
63
Data Sheet
Ball
No.
B8
A9
A8
B7
Pin Definitions - System Interface (cont’d)
Symbol
XPA
XPB
XPC
XPD
Output (O)
Supply (S)
I + PU
O
O
Input (I)
Function
Transmit Clock (TCLK)
PC(1:4).XPC(3:0) = 0011
A 2.048/8.192-MHz (E1) or 1.544/6.176-MHz
(T1/J1) clock has to be sourced by the system
if the internally generated transmit clock
(generated by DCO-X) shall not be used.
Optionally this input is used as a
synchronization clock for the DCO-X circuitry
with a frequency of 2.048 (E1) or 1.544 MHz
(T1/J1).
Transmit Multiframe Begin (XMFB)
PC(1:4).XPC(3:0) = 0100
XMFB marks the beginning of every
transmitted multiframe on XDI. The signal is
active high for one 2.048 (E1) or 1.544 MHz
(T1/J1) period.
Transmit Signaling Marker (XSIGM)
PC(1:4).XPC(3:0) = 0101
E1: Marks the transmit time slots on XDI of
every frame which are defined by register
TTR(1:4).
T1/J1: Marks the transmit time slots on XDI of
every frame which are defined by register
TTR(1:4) (if not CAS-BR is used).
When using the CAS-BR signaling scheme the
robbed bit of each channel in every sixth frame
is marked.
46
Pin Descriptions
FALC56 V1.2
PEB 2256
2002-08-27