Information

Section Number Title Page
Chapter 29
EzPort
29.1 Overview.......................................................................................................................................................................559
29.1.1 Introduction..................................................................................................................................................559
29.1.2 Features........................................................................................................................................................560
29.1.3 Modes of operation......................................................................................................................................560
29.2 External signal description............................................................................................................................................561
29.2.1 EzPort Clock (EZP_CK)..............................................................................................................................561
29.2.2 EzPort Chip Select (EZP_CS)......................................................................................................................561
29.2.3 EzPort Serial Data In (EZP_D)....................................................................................................................562
29.2.4 EzPort Serial Data Out (EZP_Q).................................................................................................................562
29.3 Command definition.....................................................................................................................................................562
29.3.1 Command descriptions.................................................................................................................................563
29.4 Flash memory map for EzPort access...........................................................................................................................569
Chapter 30
Cyclic Redundancy Check (CRC)
30.1 Introduction...................................................................................................................................................................571
30.1.1 Features........................................................................................................................................................571
30.1.2 Block diagram..............................................................................................................................................571
30.1.3 Modes of operation......................................................................................................................................572
30.2 Memory map and register descriptions.........................................................................................................................572
30.2.1 CRC Data register (CRC_CRC)..................................................................................................................573
30.2.2 CRC Polynomial register (CRC_GPOLY)..................................................................................................574
30.2.3 CRC Control register (CRC_CTRL)............................................................................................................575
30.3 Functional description...................................................................................................................................................576
30.3.1 CRC initialization/reinitialization................................................................................................................576
30.3.2 CRC calculations..........................................................................................................................................576
30.3.3 Transpose feature.........................................................................................................................................577
30.3.4 CRC result complement...............................................................................................................................579
K20 Sub-Family Reference Manual, Rev. 2, Feb 2012
22 Freescale Semiconductor, Inc.