Information
Section Number Title Page
26.1.2 Block Diagram.............................................................................................................................................477
26.2 RTC Signal Descriptions..............................................................................................................................................478
26.2.1 EXTAL32 — Oscillator Input.....................................................................................................................478
26.2.2 XTAL32 — Oscillator Output.....................................................................................................................478
26.3 External Crystal Connections.......................................................................................................................................479
26.4 Memory Map/Register Descriptions.............................................................................................................................479
26.5 Functional Description..................................................................................................................................................479
26.6 Reset Overview.............................................................................................................................................................480
26.7 Interrupts.......................................................................................................................................................................480
Chapter 27
Flash Memory Controller (FMC)
27.1 Introduction...................................................................................................................................................................481
27.1.1 Overview......................................................................................................................................................481
27.1.2 Features........................................................................................................................................................482
27.2 Modes of operation.......................................................................................................................................................482
27.3 External signal description............................................................................................................................................482
27.4 Memory map and register descriptions.........................................................................................................................483
27.4.1 Flash Access Protection Register (FMC_PFAPR).......................................................................................485
27.4.2 Flash Control Register (FMC_PFB0CR).....................................................................................................487
27.4.3 Cache Tag Storage (FMC_TAGVDW0Sn).................................................................................................489
27.4.4 Cache Tag Storage (FMC_TAGVDW1Sn).................................................................................................490
27.4.5 Cache Tag Storage (FMC_TAGVDW2Sn).................................................................................................490
27.4.6 Cache Tag Storage (FMC_TAGVDW3Sn).................................................................................................491
27.4.7 Cache Data Storage (FMC_DATAW0Sn)...................................................................................................492
27.4.8 Cache Data Storage (FMC_DATAW1Sn)...................................................................................................492
27.4.9 Cache Data Storage (FMC_DATAW2Sn)...................................................................................................493
27.4.10 Cache Data Storage (FMC_DATAW3Sn)...................................................................................................493
27.5 Functional description...................................................................................................................................................494
K20 Sub-Family Reference Manual, Rev. 2, Feb 2012
20 Freescale Semiconductor, Inc.