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ARM DDI 0389B Copyright © 2006 ARM Limited. All rights reserved. vii
List of Figures
PrimeCell AHB SRAM/NOR Memory Controller
(PL241) Technical Reference Manual
Key to timing diagram conventions ............................................................................. xii
Figure 1-1 AHB MC (PL241) configuration ................................................................................. 1-2
Figure 2-1 AHB MC (PL241) configuration ................................................................................. 2-2
Figure 2-2 AHB MC (PL241) clock domains ............................................................................... 2-3
Figure 2-3 SMC block diagram ................................................................................................... 2-4
Figure 2-4 SMC SRAM pad interface external connections ....................................................... 2-6
Figure 2-5 Big-endian implementation ...................................................................................... 2-10
Figure 2-6 AHBC memory map ................................................................................................ 2-11
Figure 2-7 Request to enter low-power mode .......................................................................... 2-13
Figure 2-8 AHB domain denying a low-power request ............................................................. 2-13
Figure 2-9 Accepting requests .................................................................................................. 2-14
Figure 2-10 SMC aclk domain FSM ........................................................................................... 2-15
Figure 2-11 Chip configuration registers .................................................................................... 2-23
Figure 2-12 Device pin mechanism ............................................................................................ 2-25
Figure 2-13 Software mechanism ............................................................................................... 2-26
Figure 2-14 Asynchronous read ................................................................................................. 2-29
Figure 2-15 Asynchronous read in multiplexed-mode ................................................................ 2-29
Figure 2-16 Asynchronous write ................................................................................................. 2-30
Figure 2-17 Asynchronous write in multiplexed-mode ................................................................ 2-31
Figure 2-18 Page read ................................................................................................................ 2-32
Figure 2-19 Synchronous burst read .......................................................................................... 2-33