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PEB20321 Datasheet(PDF) 63 Page - Infineon Technologies AG |
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PEB20321 Datasheet(HTML) 63 Page - Infineon Technologies AG |
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63 / 366 page  PEB 20321 PEF 20321 Basic Functional Principles Data Sheet 63 2001-02-14 Fixed Size Frame Oriented Protocols (V110/X.30) Normal operation, E, S, X change (indicated by the V.110-bit in the transmit descriptor) Example for TRV = ‘11’ Note: 1. FNUM must be 0 for all transmit descriptors. 2. The actual E-, S-, X-bits have to be in the first transmit descriptor after reset. 3. As shown in the example the contiguous parts of a data section belonging to one descriptor are sent in contiguous frames (DATA 1(1) are the bytes 0 – 3 of DATA 1, DATA 1(2) are the bytes 4 – 7 of DATA 1). If the end of a data section is reached within a frame, the frame is continued with data from the next data section belonging to a transmit descriptor with the bit V.110 = 0 (DATA 2(2) = byte 4 of DATA 2, DATA 3(1) =byte 0 – 2 of DATA 3). 4. The E-, S-, X-bits are only changed from one frame to the next not within a frame. The change occurs in the first frame which does not contain data of the previous data section. 5. Neither FE nor HOLD may be set to 1 during a normal operation of the mode. They both lead to an abort of the serial interface. |
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