peb20560 Infineon Technologies Corporation, peb20560 Datasheet - Page 144

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

PEB 20560
Functional Block Description
Note: It is unnecessary for the user to read the CB bit during regular work with the
PEDIU, in purpose to access the right block in the circular buffer. During regular
work, (in modes 0, 1, 2, 3 or 4, when the PEDIU is active), the PEDIU uses the CB
signal internally for both DMA accesses to the circular buffer and DSP accesses
to the circular buffer. In the case of DSP access to the circular buffer, the PEDIU
disregards one of the address bits supplied by the DSP, and use CB instead. In
this way any DSP access to the circular buffer accesses a permissible block,
automatically. For more details refer to section 2.8.5.3.
Actually, the PEDIU Status Register is used only for PEDIU testing.
Semiconductor Group
2-98
2003-08