peb20560 Infineon Technologies Corporation, peb20560 Datasheet - Page 214

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

Semiconductor Group
pre-processed time-slot, the odd one, is also accessed by the µP. In downstream
direction a 4-, 6- or 8-bit static value can be transmitted. In upstream direction the
received 8-bit value can be read. Additionally, a change detection mechanism will
generate an interrupt upon a change in any of the selected 4, 6 or 8 bits.
Pre-processed channels are usually programmed after Control Memory (CM) reset
during device initialization. Resetting the CM sets all CFI time-slots to unassigned
channels (CM code ‘0000’). Of course, pre-processed channels can also be initialized or
re-initialized in the operational phase of the device.
To program a pair of pre-processed channels the correct code for the selected handling
scheme must be written to the CM. Figure 3-3 gives an overview of the available
pre-processing codes and their application.
Note: To operate the D-channel arbiter, an IOM-2 configuration with central-, or
decentral D-channel handling should be programmed. With the D-channel arbiter
enabled, D-channel bits are handled by the SACCO-A.
3-8
Operational Description
PEB 20560
2003-08