Intel PXA26X User Manual
Page 6
vi
Intel® PXA26x Processor Family Developer’s Manual
Contents
6.2
Functional Description .......................................................................................................6-2
6.2.1
SDRAM Interface Overview.................................................................................. 6-2
6.2.2
Static Memory Interface / Variable Latency I/O Interface .....................................6-3
6.2.3
16-Bit PC Card / Compact Flash Interface ...........................................................6-4
6.3
Memory System Examples ................................................................................................6-4
6.4
Memory Accesses .............................................................................................................6-6
6.4.1
Reads and Writes .................................................................................................6-7
6.4.2
Aborts and Nonexistent Memory ..........................................................................6-7
6.5
Memory Configuration Registers .......................................................................................6-8
6.6
Synchronous DRAM Memory Interface .............................................................................6-9
6.6.1
SDRAM MDCNFG Register.................................................................................. 6-9
6.6.2
SDRAM Mode Register Set Configuration Register ...........................................6-12
6.6.3
SDRAM MDREFR Register ................................................................................6-14
6.6.4
SDRAM Memory Options ...................................................................................6-17
6.6.5
SDRAM Command Overview .............................................................................6-25
6.6.6
SDRAM Waveforms............................................................................................6-27
6.7
Synchronous Static Memory Interface.............................................................................6-30
6.7.1
Synchronous Static Memory Configuration Register ..........................................6-30
6.7.2
Synchronous Static Memory Mode Register Set Configuration Register ...........6-36
6.7.3
Synchronous Static Memory Timing Diagrams...................................................6-37
6.7.4
Non-SDRAM Timing SXMEM Operation ............................................................6-38
6.8
Asynchronous Static Memory ..........................................................................................6-41
6.8.1
Static Memory Interface......................................................................................6-41
6.8.2
Asynchronous Static Memory Control Registers (MSC0 – 2).............................6-44
6.8.3
ROM Interface ....................................................................................................6-48
6.8.4
SRAM Interface Overview ..................................................................................6-51
6.8.5
Variable Latency I/O (VLIO) Interface Overview.................................................6-53
6.8.6
FLASH Memory Interface ...................................................................................6-56
6.9
16-Bit PC Card/Compact Flash Interface ........................................................................6-57
6.9.1
Expansion Memory Timing Configuration Register ............................................6-58
6.9.2
Expansion Memory Configuration Register (MECR) ..........................................6-61
6.9.3
16-Bit PC Card Overview....................................................................................6-61
6.9.4
External Logic for 16-Bit PC Card Implementation .............................................6-64
6.9.5
Expansion Card Interface Timing Diagrams and Parameters ............................6-67
6.10
Companion Chip Interface ...............................................................................................6-68
6.10.1 Alternate Bus Master Mode ................................................................................6-70
6.11
Options and Settings for Boot Memory............................................................................6-72
6.11.1 Alternate Booting ................................................................................................6-72
6.11.2 Boot Time Defaults .............................................................................................6-72
6.11.3 Memory Interface Reset and Initialization...........................................................6-75
6.12
Hardware, Watchdog, or Sleep Reset Operation ............................................................6-76
6.13
General Purpose Input/Output Reset Procedure.............................................................6-78
7
Liquid Crystal Display Controller ..................................................................................................7-1
7.1
Overview............................................................................................................................7-1
7.1.1
Features................................................................................................................ 7-2
7.1.2
Pin Descriptions....................................................................................................7-4
7.2
Liquid Crystal Display Controller Operation.......................................................................7-4
7.2.1
Enabling the Controller .........................................................................................7-4
7.2.2
Disabling the Controller ........................................................................................7-5