NXP Semiconductors K22F series - Page 24

Section number Title Page
30.2.3 EzPort Serial Data In (EZP_D)....................................................................................................................684
30.2.4 EzPort Serial Data Out (EZP_Q)................................................................................................................. 684
30.3 Command definition..................................................................................................................................................... 684
30.3.1 Command descriptions.................................................................................................................................685
30.4 Flash memory map for EzPort access...........................................................................................................................692
Chapter 31
External Bus Interface (FlexBus)
31.1 Introduction...................................................................................................................................................................693
31.1.1 Definition..................................................................................................................................................... 693
31.1.2 Features........................................................................................................................................................ 693
31.2 Signal descriptions........................................................................................................................................................694
31.3 Memory Map/Register Definition.................................................................................................................................696
31.3.1
Chip Select Address Register (FB_CSARn)................................................................................................697
31.3.2
Chip Select Mask Register (FB_CSMRn)................................................................................................... 698
31.3.3
Chip Select Control Register (FB_CSCRn).................................................................................................699
31.3.4 Chip Select port Multiplexing Control Register (FB_CSPMCR)................................................................702
31.4 Functional description...................................................................................................................................................703
31.4.1 Use cases......................................................................................................................................................703
31.4.2 Address comparison.....................................................................................................................................704
31.4.3 Address driven on address bus.....................................................................................................................704
31.4.4 Connecting address/data lines......................................................................................................................704
31.4.5 Bit ordering.................................................................................................................................................. 705
31.4.6 Data transfer signals.....................................................................................................................................705
31.4.7 Signal transitions..........................................................................................................................................705
31.4.8 Data-byte alignment and physical connections............................................................................................705
31.4.9 Address/data bus multiplexing.....................................................................................................................707
31.4.10 Data transfer states.......................................................................................................................................708
31.4.11 FlexBus Timing Examples...........................................................................................................................709
31.4.12 Burst cycles..................................................................................................................................................728
K22F Sub-Family Reference Manual, Rev. 4, 08/2016
24 NXP Semiconductors