Section number Title Page
Chapter 3
Signal Descriptions
3.1 Signals overview...........................................................................................................................................................105
3.2 Configuration signals sampled at reset.........................................................................................................................116
3.3 Output signal states during reset...................................................................................................................................118
Chapter 4
Reset, Clocking, and Initialization
4.1 Overview.......................................................................................................................................................................119
4.2 External signal descriptions..........................................................................................................................................119
4.2.1 System control signals...............................................................................................................................120
4.2.2 Clock signals..............................................................................................................................................121
4.3 Accessing configuration, control, and status registers..................................................................................................122
4.3.1 Updating CCSRBAR.................................................................................................................................122
4.3.2 Accessing alternate configuration space....................................................................................................123
4.3.3 Boot page translation.................................................................................................................................124
4.3.4 Boot sequencer...........................................................................................................................................124
4.4 Reset Memory Map/Register Definition.......................................................................................................................124
4.4.1 Configuration, control, and status registers base address register (Reset_CCSRBAR)............................125
4.4.2 Alternate configuration base address register (Reset_ALTCBAR)...........................................................126
4.4.3 Alternate configuration attribute register (Reset_ALTCAR)....................................................................126
4.4.4 Boot page translation register (Reset_BPTR)............................................................................................127
4.5 Functional description...................................................................................................................................................127
4.5.1 Reset operations.........................................................................................................................................127
4.5.1.1 Soft reset................................................................................................................................128
4.5.1.2 Hard reset...............................................................................................................................128
4.5.2 Power-on reset sequence............................................................................................................................128
4.5.3 Power-on reset configuration.....................................................................................................................130
4.5.3.1 System PLL ratio...................................................................................................................131
4.5.3.2 DDR PLL Ratio.....................................................................................................................132
P2020 QorIQ Integrated Processor Reference Manual, Rev. 2, 12/2012
Freescale Semiconductor, Inc. 5
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