peb20560 Infineon Technologies Corporation, peb20560 Datasheet - Page 141

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

Note:
– The data rate of each output stream is identical to the one of an input stream, and the
– In Mode0 DCL is a double clock, which means that a new bit streams in every 2 DCL
– In all modes FSC = 8 kHz.
– In modes 0, 1, 2, 3 DSP clock rate can be 20 MHz, 30 MHz or 40 MHz. In mode 4 DSP
– DCL rate may be 2.048 MHz, 4.096 MHz or 8.192 MHz.
– In Modes 2 and 3 there are 64 time-slots in each frame. In mode 2 the circular buffer
The exact address space of each circular buffer block, as a function of the PEDIU work
mode, can be seen in Table 2-22.
Table 2-22 Address Spaces of Circular Buffer Blocks as a Function of the PEDIU
Mode
Modes
0, 1 & 2
Mode
3 & 4
Semiconductor Group
number of output streams is identical to the number of input streams in any mode.
cycles. In modes 1, 2 and 3 DCL is a single clock.
clock rate should be 40 MHz
is divided into 4 IN blocks and 4 OUT blocks of 32 words each (in the same way as in
mode0), so only the first 32 time-slots, coming in each IN-stream, can be handled by
the PEDIU. Unlike mode 2, in mode 3 the circular buffer divided into 2 IN blocks and
2 OUT blocks of 64 words each, so handling of all 64 time-slots of the frame is
possible, but only of the IN0 input-stream. The division of the circular buffer in Mode 4,
is as in Mode 3.
IN0 - 0 IN0 - 1 IN1 - 0 IN1 - 1
0x00 -
0x1F
0x00 -
0x3F
Work Mode
0x20 -
0x3F
−
IN Blocks
0x40 -
0x5F
0x40 -
0x7F
0x60 -
0x7F
−
2-95
OUT0 - 0 OUT0 - 1 OUT1 - 0 OUT1 - 1
0x80
-0x9F
0x80 -
0xBF
Functional Block Description
0xA0 -
0xBF
−
OUT Blocks
0xC0 -
0xDF
0xC0 -
0xFF
PEB 20560
0xE0 -
0xFF
−
2003-08