peb20560 Infineon Technologies Corporation, peb20560 Datasheet - Page 92

• Manufacturer Part Number: peb20560
• Description: Dsp Oriented Pbx Controller Doc
• Manufacturer: Infineon Technologies Corporation

Semiconductor Group
2.3.1.2
The PCM multiplexer connects the 4 PCM ports of the DOC to the two integrated ELICs.
The PCM-MUX can be programmed to one of 2 different modes:
MODE 0
• ELIC0 and ELIC1 are connected together: TXD00 with TXD10, RXD00 with RXD10,
MODE 1
• Only the Ports 0 and 2 of both ELICs are connected to DOC pins, Figure 2-27
Figure 2-27 PCM-Ports Multiplexer in Mode 1
The TxD output data lines at the DOC have tri-state capability so that the DOC may be
connected in parallel with further devices at the PCM interface. Additional tri-state control
lines (TSC) indicate valid/invalid time-slots on the PCM interface. They can be used as
control signals for external drivers. The RxD inputs contain a protection logic limiting the
input current to 2.3 mA if the DOC is without power supply.
… Figure 2-24 (State after DOC Reset)
PCM-Ports Multiplexer for PCM Highways
SACCO-B0
SACCO-B1
ELIC
ELIC
ELIC -1
R
R
R
-S
-0
1
3
1
3
0
2
0
2
PCM
MODE 1
PCM - MUX
Ports
2-46
Signaling
Functional Block Description
PCM
Highways
0
1
2
3
Signaling
ITS10082
PEB 20560
2003-08