PEB22554 SIEMENS [Siemens Semiconductor Group], PEB22554 Datasheet - Page 194

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

Pin Definitions and Function (cont’d)
Pin No.
109, 144,
37, 72
38, 71,
110, 143
1, 36, 73,
108
Semiconductor Group
Symbol
XL1(1-4)
XDOP(1-4)
XOID(1-4)
VDDX
V
SSX
Input (I)
Output (O)
O
O
O
I
I
Function
Transmit Line 1
Analog output for the external transformer.
Selected if LIM1.DRS = 0. After Reset this pin is in
a high impedance state until register FMR0.XC1 is
set to one.
Transmit Data Output Positive
This digital output for transmitted dual rail PCM(+)
route signals can provide
– half bauded signals with 50% duty cycle
– full bauded signals with 100% duty cycle
The data will be clocked off on the positive
transitions of XCLK in both cases. Output sense
is selected by bit LIM0.XDOS (after Reset: active
low). The dual rail mode is selected if
LIM1.DRS = 1 and FMR0.XC1 = 1. After Reset
this pin is in a high impedance state until register
LIM1.DRS is set to one.
Transmit Optical Interface Data
Unipolar data sent to fibre optical interface with
1.544 MBit/s which will be clocked off on the
positive transitions of XCLK. Clocking off data in
NRZ code is done with 100 % duty cycle. Data in
CMI code are shifted out with 50 % or 100 % duty
cycle according to the CMI coding. Output sense
is selected by bit LIM0.XDOS (after Reset: data is
sent active high).
The single rail mode is selected if LIM1.DRS = 1
and FMR0.XC1 = 0. After Reset this pin is in a
high impedance state until register LIM1.DRS is
set to one.
Positive Power Supply for analog transmitter
Power Supply Ground for analog transmitter
(LIM0.XFB = 0) or
(LIM0.XFB = 1)
194
General Features T1
PEB 22554
09.98