peb20560 Infineon Technologies Corporation, peb20560 Datasheet - Page 71

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

PEB 20560
Functional Block Description
Extended Transparent Mode 0 (MODE:MDS1, MDS0, ADM = 110)
Characteristics: fully transparent without HDLC framing, any message length, any
window size.
Data is stored in register RAL1.
In extended transparent mode, fully transparent data transmission/reception without
HDLC-framing
is
performed,
i.e.
without
FLAG-generation/recognition,
CRC-generation/check, bit stuffing mechanism. This allows user specific protocol
variations or can be used for test purposes (e.g. to generate frames with wrong
CRC-words).
Data transmission is always performed out of the XFIFO. Data reception is done via
register RAL1, which contains the actual data byte assembled at the RxD pin.
Extended Transparent Mode 1 (MODE:MDS1, MDS0, ADM = 111)
Characteristics: fully transparent without HDLC-framing, any message length, any
window size. Data is stored in register RAL1 and RFIFO.
Identical behavior as extended transparent mode 0 but the received data is shifted
additionally into the RFIFO.
Receive Data Flow (summary)
The following figure gives an overview of the management of the received HDLC-frames
depending on the selected operating mode.
Semiconductor Group
2-25
2003-08