PEB24902 Datasheet, PDF (13/50 Pages) Siemens Semiconductor Group – Quad ISDN Echocancellation Circuit Analogue Front End Quad IEC AFE

PEB 24902
PEF 24902
Overview
Table 1
Pin Definitions and Functions (cont’d)
Pin No. Symbol
40 PDM3
8 PDM4
31 XDN1
18 XDN2
50 XDN3
63 XDN4
24 SDX
41 SDR
Input (I) Description
Output (O)
Reference
O
Pulse density modulated output of the 3.2.1, 4.2
second-order sigma-delta ADC of line
port 3
O
Pulse density modulated output of the 3.2.1, 4.2
second-order sigma-delta ADC of line
port 4.
I
Input for Transmit data in NT mode. 3.4
Not used in LT-Mode. Internal
pulldown.
I
Input for Transmit data in NT mode. 3.4
Not used in LT-Mode. Internal
pulldown.
I
Input for Transmit data in NT mode. 3.4
Not used in LT-Mode. Internal
pulldown.
I
Input for Transmit data in NT mode. 3.4
Not used in LT-Mode. Internal
pulldown.
I
Interface for the transmit and control 3.3, 4.2
data. Up to eight lines can be
multiplexed on SDX. Transmission
and sampling is based on clock CL15
(15,36 MBit/sec):
For each line port the following bits
are exchanged:
TD0, TD1, TD2: Transmit data
RANGE: Range select
LOOP: Analogue loop back switch
PDOW: Power down/power up
NT: NT-Mode or LT-Mode
Synchronization information
O
Level information for the detection of 3.3, 4.2
the awake tone. The four lines are
multiplexed on SDR.
Semiconductor Group
13
05.96