7 hdlc receive buffer descriptor (rxbd), Hdlc receive buffer descriptor (rxbd) -9 – Motorola MPC8260 User Manual

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MOTOROLA

Chapter 31. FCC HDLC Controller

31-9

Part IV. Communications Processor Module

31.7 HDLC Receive Buffer Descriptor (RxBD)

The HDLC controller uses the RxBD to report on data received for each buffer. Figure 31-4
shows an example of the RxBD process.

24-25

CRC

CRC selection
00 16-bit CCITT-CRC (HDLC). X16 + X12 + X5 + 1
01 Reserved
10 32-bit CCITT-CRC (Ethernet and HDLC). X32 + X26 + X23 + X22 + X16 + X12 + X11 + X10 + X8

+ X7 + X5 + X4 + X2 + X1 +1

11 Reserved

26Р31

Reserved, should be cleared.

Table 31-6. FPSMR Field Descriptions (Continued)

Bits

Name

Description