PEB22554 SIEMENS [Siemens Semiconductor Group], PEB22554 Datasheet - Page 193

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

Pin Definitions and Function (cont’d)
Pin No.
42, 67,
114, 132,
139
45, 64,
117,135,
136
111, 142,
39, 70
Semiconductor Group
Symbol
V
V
XL2(1-4)
XDON(1-4)
XFM(1-4)
DDR
SSR
Input (I)
Output (O)
I
I
O
O
O
Function
Positive Power Supply for the analog receiver
Power Supply Ground for the analog receiver
Transmit Line 2
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 Negative
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 Frame Marker
This digital output marks the first bit of every
frame. This function is only available in the optical
interface mode LIM1.DRS=1 and FMR0.XC1 = 0.
The data will be clocked off on the positive
transitions of XCLK. After Reset this pin is in a
high impedance state until register LIM1.DRS is
set to one.
In remote loop configuration the XFM marker is
not valid.
(LIM0.XFB = 0) or
(LIM0.XFB = 1)
193
General Features T1
PEB 22554
09.98