S3C2440 데이터 시트보기 (PDF) - Samsung

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S3C2440

32-BIT CMOS MICROCONTROLLER

Samsung 

Table of Contents (Continued)

Chapter 5

Memory Controller

Overview .............................................................................................................................................5-1

Function Description............................................................................................................................5-4

Bank0 Bus Width........................................................................................................................5-4

Memory (SROM/SDRAM) Address Pin Connections.......................................................................5-4

Sdram Bank Address Pin Connection Example..............................................................................5-5

nWAIT Pin Operation ...................................................................................................................5-6

nXBREQ/nXBACK Pin Operation...................................................................................................5-7

Programmable Access Cycle .......................................................................................................5-12

Bus Width & Wait Control Register (Bwscon).................................................................................5-14

Bank Control Register (Bankconn: NGCS0-NGCS5) .......................................................................5-16

Bank Control Register (Bankconn: NGCS6-NGCS7) .......................................................................5-17

Refresh Control Register ..............................................................................................................5-18

Banksize Register .......................................................................................................................5-19

Sdram Mode Register Set Register (MRSR)...................................................................................5-20

Chapter 6

Nand Flash Contorller

Overview .............................................................................................................................................6-1

Features .....................................................................................................................................6-1

Block Diagram ............................................................................................................................6-2

Boot Loader Function...................................................................................................................6-2

Pin Configuration .........................................................................................................................6-3

Nand Flash Memory Configuration Table........................................................................................6-3

Nand Flash Memory Timing..........................................................................................................6-4

Software Mode ....................................................................................................................................6-5

Steppingstone (4K-Byte SRAM)....................................................................................................6-6

Ecc (Error Correction Code)..................................................................................................................6-7

2048 Byte ECC Parity Code Assignment Table ..............................................................................6-7

16 Byte ECC Parity Code Assignment Table..................................................................................6-7

ECC Module Features..................................................................................................................6-8

ECC Programming Guide .............................................................................................................6-8

Nand Flash Memory Mapping .......................................................................................................6-9

Nand Flash Memory Configuration.................................................................................................6-10

Nand Flash Configuration Register ................................................................................................6-12

Control Register ..........................................................................................................................6-13

Command Register......................................................................................................................6-15

Address Register.........................................................................................................................6-15

Data Register..............................................................................................................................6-15

Main Data Area Register ..............................................................................................................6-16

Spare Area Ecc Register.............................................................................................................6-17

NFCON Status Register...............................................................................................................6-18

ECC0/1 Status Register...............................................................................................................6-19

Main Data Area ECC0 Status Register ..........................................................................................6-20

Spare Area ECC Status Register ..................................................................................................6-20

Block Address Register ...............................................................................................................6-21

S3C2440A MICROCONTROLLER

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