PEB22554 SIEMENS [Siemens Semiconductor Group], PEB22554 Datasheet - Page 23
PEB22554
Manufacturer Part Number
PEB22554
Description
ICs for Communications
Manufacturer
SIEMENS [Siemens Semiconductor Group]
Datasheet
1.PEB22554.pdf
(397 pages)
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Pin Definitions and Function (cont’d)
Pin No.
3, 19, 21,
50
2, 18, 20,
49
Semiconductor Group
Symbol
SCLKX
(1-4)
XDI(1-4)
Input (I)
Output (O)
I/O + PU
I
Function
System Clock Transmit
Working clock for the transmit system interface
with a frequency of 16.384 / 8.192 / 4.096 /
2.048 MHz.
In system interface multiplex mode a 16.384 or
8.192 MHz clock has to be provided on
SCLKX1, which is a common clock for all 4
transmit system interfaces.
Transmit Data In
Transmit data received from the system
highway. Latching of data is done with rising or
falling transitions of SCLKX according to bit
SIC3.RESX.
The delay between the beginning of time-slot 0
and the initial edge of SCLKX (after SYPX goes
active) is determined by the registers XC1/0.
In system interface multiplex mode latching of
datastream containing the 4 frames is done
byte or bit interleaved on port XDI1. In higher
data rates sampling of data is defined by bits
SIC2.SICS2-0.
23
Pin Descriptions E1
PEB 22554
09.98
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