PEB20571F-V31 Infineon Technologies, PEB20571F-V31 Datasheet - Page 121

• Manufacturer Part Number: PEB20571F-V31
• Manufacturer: Infineon Technologies

Specifications of PEB20571F-V31

• Lead Free Status / Rohs Status: Not Compliant

4.4
PCM Interface Features
The PCMU enables the DSP to control the 4 PCM ports. The DSP accesses the
incoming PCM time slots, and prepares the outgoing PCM time slots. In general, the
PCMU enables the DSP to switch time slots from PCMU to PCMU, IOMU and TRANSIU.
The basic structure and programming model of the PCMU is similar to the IOMU.
However, the PCMU provides the double capacity of the IOMU. Thus it may handle up
to 4 PCM ports and an overall of 128 time slots per frame in the receive direction and
128 time slots per frame in the transmit direction.
The following PCMU data rate modes are available:
• Four streams of 2.048 Mbit/s each (single and double clock)
• Two streams of 4.096 Mbit/s each (single and double clock)
• One stream of 8.192 Mbit/s (single and double clock)
• One stream of 16.384 Mbit/s (single clock). It is programmable, whether the first or the
Note: Other data rates, e.g. 3 x 8.192 Mbit/s are possible by a firmware change. This is
Tri-state control is performed via pins TSCn, programmable per time slot and port.
Data Sheet
second 128 time slots of the 8 kHz frame are handled in the PCMU.
realized by assigning DSP data memory to the PCMU.
PCM Unit
104
Functional Description
PEB 20570
PEB 20571
2003-07-31