PEB22554 SIEMENS [Siemens Semiconductor Group], PEB22554 Datasheet - Page 199

• Manufacturer Part Number: PEB22554
• Description: ICs for Communications
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Pin Definitions and Function (cont’d)
Pin No.
4 -7,
14 -17,
22 - 25,
32 - 35
3, 19, 21,
50
2, 18, 20,
49
Semiconductor Group
Symbol
RP(A-D)1
RP(A-D)2
RP(A-D)3
RP(A-D)4
SCLKX
(1-4)
XDI(1-4)
Input (I)
Output (O)
O
I/O + PU
I
Function
Receive Frame Synchronous Pulse (RFSP)
Enabled with PC(1-4).RPC(2-0) = 111.
Active low framing pulse derived from the received
PCM route signal. During loss of synchronization
(bit FRS0.LFA), this pulse is suppressed (not
influenced during alarm simulation).
Pulse frequency: 8 kHz, Pulse width: 648 ns
System Clock Transmit
Working clock for the transmit system interface
with a frequency of 16.384 / 8.192 / 4.096 / 2.048
or 12.352 /6.176 / 3.088 / 1.544 MHz.
In system interface multiplex mode a 16.384
/12.352 or 8.192 / 6.176 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.
199
General Features T1
PEB 22554
09.98