peb2255 Infineon Technologies Corporation, peb2255 Datasheet - Page 40
peb2255
Manufacturer Part Number
peb2255
Description
E1/t1/j1 Framer And Line Interface Component For Long And Short Haul Applications
Manufacturer
Infineon Technologies Corporation
Datasheet
1.PEB2255.pdf
(374 pages)
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Table 4
Pin No.
64
62
55
Data Sheet
Symbol
SYPX
SCLKX
XDI
Pin Definitions - System Interface (cont’d)
Input (I)
Output (O)
Supply (S)
I
I
I
Function
Synchronous Pulse Transmit
Defines the beginning of time slot 0 at system
highway port XDI together with the values of
XC0.XCO, XC1.XTO and XC1.XCOS. Sampling
is done with the falling edge of SCLKX.
The pulse cycle is an integer multiple of 125 µs.
System Clock Transmit
Working clock for the transmit system interface
with a frequency of 8.192 MHz (SIC1.SXSC = 0,
SIC1.SRSC = 0) or 2.048 MHz (E1)/1.544 MHz
(T1/J1) (SIC1.SXSC = 1, SIC1.SRSC = 1).
Transmit Data In
Transmit data received from the system
highway. Latching of data is done with the falling
transitions of SCLKX.
E1 data rate (SCLKX = 8.192 MHz):
FMR1.IMOD = 0: 4096 kbit/s
FMR1.IMOD = 1: 2048 kbit/s
E1 data rate (SCLKX = 2.048MHz):
FMR1.IMOD = 1 & SIC1.SXSC = 1: 2048kbit/s
T1/J1data rate (SCLKX = 8.192 MHz):
FMR1.IMOD = 0: 4096 kbit/s
FMR1.IMOD = 1 & SIC1.SXSC = 0: 2048 kbit/s
T1/J1data rate (SCLKX = 1.544 MHz):
FMR1.IMOD = 1 & SIC1.SXSC = 1: 1544 kbit/s
The delay between the beginning of time slot 0
and the initial edge of SCLKX (after SYPX goes
active) is determined by the values of transmit
time slot offset (XC1.XTO5-0), transmit clock
slot offset (XC0.XCO2-0) and XC1.XCOS.
40
Pin Descriptions
FALC-LH V1.3
PEB 2255
2000-07
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