
TABLE OF CONTENTS
viii
EPSON
S1C33205 TECHNICAL MANUAL
VI SDRAM CONTROLLER BLOCK
VI-1 INTRODUCTION ............................................................................................B-VI-1-1
VI-2 SDRAM INTERFACE...................................................................................... B-VI-2-1
Outline of SDRAM Interface..........................................................................................................................B-VI-2-1
SDRAM Controller Block Diagram..............................................................................................................B-VI-2-1
I/O Pins and Connection................................................................................................................................B-VI-2-2
I/O Pins ..................................................................................................................................................B-VI-2-2
Connection Examples.......................................................................................................................B-VI-2-2
SDRAM Controller Configuration................................................................................................................B-VI-2-5
Setting PLL ...........................................................................................................................................B-VI-2-5
BCU Configuration .............................................................................................................................B-VI-2-5
SDRAM Setting Conditions ............................................................................................................B-VI-2-6
SDRAM Operation.........................................................................................................................................B-VI-2-12
Synchronous Clock.........................................................................................................................B-VI-2-12
Power-up and Initialization...........................................................................................................B-VI-2-13
SDRAM Commands .......................................................................................................................B-VI-2-14
Read/Write Cycles...........................................................................................................................B-VI-2-15
Refresh Mode ...................................................................................................................................B-VI-2-16
Power-down Mode..........................................................................................................................B-VI-2-18
Bus Release Procedure................................................................................................................B-VI-2-18
I/O Memory of SDRAM Interface .............................................................................................................B-VI-2-20
Programming Notes ......................................................................................................................................B-VI-2-31
Examples of SDRAM Controller Initialization Program....................................................................B-VI-2-32
APPENDIX
I/O MAP