Information

Section Number Title Page
Chapter 29
EzPort
29.1 Overview.......................................................................................................................................................................557
29.1.1 Introduction..................................................................................................................................................557
29.1.2 Features........................................................................................................................................................558
29.1.3 Modes of operation......................................................................................................................................558
29.2 External signal description............................................................................................................................................559
29.2.1 EzPort Clock (EZP_CK)..............................................................................................................................559
29.2.2 EzPort Chip Select (EZP_CS)......................................................................................................................559
29.2.3 EzPort Serial Data In (EZP_D)....................................................................................................................560
29.2.4 EzPort Serial Data Out (EZP_Q).................................................................................................................560
29.3 Command definition.....................................................................................................................................................560
29.3.1 Command descriptions.................................................................................................................................561
29.4 Flash memory map for EzPort access...........................................................................................................................567
Chapter 30
Cyclic Redundancy Check (CRC)
30.1 Introduction...................................................................................................................................................................569
30.1.1 Features........................................................................................................................................................569
30.1.2 Block diagram..............................................................................................................................................569
30.1.3 Modes of operation......................................................................................................................................570
30.2 Memory map and register descriptions.........................................................................................................................570
30.2.1 CRC Data register (CRC_CRC)..................................................................................................................571
30.2.2 CRC Polynomial register (CRC_GPOLY)..................................................................................................572
30.2.3 CRC Control register (CRC_CTRL)............................................................................................................573
30.3 Functional description...................................................................................................................................................574
30.3.1 CRC initialization/reinitialization................................................................................................................574
30.3.2 CRC calculations..........................................................................................................................................574
30.3.3 Transpose feature.........................................................................................................................................575
30.3.4 CRC result complement...............................................................................................................................577
K20 Sub-Family Reference Manual, Rev. 2, Feb 2012
22 Freescale Semiconductor, Inc.