PSB2115FV1.2D Lantiq, PSB2115FV1.2D Datasheet - Page 149

• Manufacturer Part Number: PSB2115FV1.2D
• Manufacturer: Lantiq

Specifications of PSB2115FV1.2D

• Lead Free Status / Rohs Status: Supplier Unconfirmed

PSB 2115
PSF 2115
Functional Description
The PCM interface can be used to build a connection between non IOM-2 compatible
voice/data controllers and the IOM-2 interface in order to transfer B-channel data from/
to the external device. Receive data on the DD line can be mapped to any timeslot on
the PCMOUT line. Data received from the external device on any timeslot on PCMIN can
be mapped to the DU line (see figure 72).
Data which is received on PCMIN is forwarded to the DU line with the next IOM-2 frame.
Similar for the opposite direction, data on DD is forwarded to the PCMOUT line with the
next FSC frame.
For test purposes data on PCMIN can be mapped to DD and B-channel data on DU can
be mapped to PCMOUT (refer to chapter 2.8.2.3).
®
Figure 72
Switching Data between PCM and IOM
-2
Data transfer from/to the host is performed via the 64-byte FIFOs. The paragraphs above
describe the procedures when data is tranferred between FIFO and IOM-2 interface
while the corresponding data is mapped from IOM-2 to the PCM interface.
In a similar way data can be transferred directly between FIFO and PCM interface while
the corrsponding PCM timeslots are mapped to the IOM-2 interface (figure 73). The
programming of timeslots on PCM (timeslot position and length) is the same as for
IOM-2, the only difference is that the data path is switched from FIFO
IOM-2
(DPS = 0) to FIFO
PCM (DPS = 1), the timeslot switching between PCM and IOM-2
also remains the same.
Semiconductor Group
149
11.97