VI SDRAM CONTROLLER BLOCK: SDRAM INTERFACE
B-VI-2-14
EPSON
S1C33L03 FUNCTION PART
SDRAM power
BCLK
Command
SDCKE
#SDCEx
#SDRAS
#SDCAS
#SDWE
HDQM/LDQM
SDRENA bit
SDRIS bit
SDRINI bit
SDRMRS bit
Internal #WAIT
SDA10
SDBA[1:0]
SDA[12:11, 9:0]
PALL
NOP
H
H
MRS
REF
REF
CMD
Valid
Valid
Valid
Valid
Valid
Valid
100
µ
s min.
t
RP
t
RSC
t
RC
t
RC
V
CC(Min.)
Figure 2.10 SDRAM Power-up and Initialization
SDRAM Commands
The SDRAM is controlled by commands that are comprised of a combination of high or low logic level signals.
Table 2.11 lists the commands output by the SDRAM controller.
Table 2.11 List of the Supported SDRAM Commands
Command
Pins
Function
Symbol
SDCKE
DQM
H/LDQM
Bank
A[15:14]
SDA10
SDA
A[13:12]
A[10:1]
#SDCEx
#SDRAS
#SDCAS
#SDWE
Bank Active
ACTV
H
X
V
V
V
L
L
H
H
Bank Precharge
PRE
H
X
V
L
X
L
L
H
L
Precharge All
PALL
H
X
X
H
X
L
L
H
L
Write
WRIT
H
X
V
L
V
L
H
L
L
Read
READ
H
X
V
L
V
L
H
L
H
Mode Register Set
MRS
H
X
V
V
V
L
L
L
L
Deselect / NOP
NOP
H
X
X
X
X
H
X
X
X
Auto Refresh
REF
H
X
X
X
X
L
L
L
H
Self Refresh Entry
SELF
H
→
L
X
X
X
X
L
L
L
H
Self Refresh Exit
–
L
→
H
X
X
X
X
H
X
X
X
Data Write/Output
Enable
–
H
L
X
X
X
X
X
X
X
Data Write/Output
Disable
–
H
H
X
X
X
X
X
X
X
V = valid, X = don’t care, L = low level, H = high level
Because all of these commands are output by the SDRAM controller as necessary, they do not need to be
controlled by a user program, except for the commencement of initialization by SDRINI.
Summary of Contents for CMOS 32-Bit Single Chip Microcomputer S1C33L03
Page 4: ......
Page 14: ......
Page 15: ...S1C33L03 PRODUCT PART ...
Page 16: ......
Page 147: ...S1C33L03 FUNCTION PART ...
Page 148: ......
Page 149: ...S1C33L03 FUNCTION PART I OUTLINE ...
Page 150: ......
Page 152: ...I OUTLINE INTRODUCTION B I 1 2 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 162: ...I OUTLINE LIST OF PINS B I 3 8 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 163: ...S1C33L03 FUNCTION PART II CORE BLOCK ...
Page 164: ......
Page 166: ...II CORE BLOCK INTRODUCTION B II 1 2 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 172: ...II CORE BLOCK CPU AND OPERATING MODE B II 2 6 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 176: ...II CORE BLOCK INITIAL RESET B II 3 4 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 224: ...II CORE BLOCK BCU Bus Control Unit B II 4 48 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 262: ...II CORE BLOCK DBG Debug Unit B II 7 2 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 263: ...S1C33L03 FUNCTION PART III PERIPHERAL BLOCK ...
Page 264: ......
Page 266: ...III PERIPHERAL BLOCK INTRODUCTION B III 1 2 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 322: ...III PERIPHERAL BLOCK WATCHDOG TIMER B III 5 4 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 415: ...S1C33L03 FUNCTION PART IV ANALOG BLOCK ...
Page 416: ......
Page 418: ...IV ANALOG BLOCK INTRODUCTION B IV 1 2 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 434: ...IV ANALOG BLOCK A D CONVERTER B IV 2 16 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 435: ...S1C33L03 FUNCTION PART V DMA BLOCK ...
Page 436: ......
Page 438: ...V DMA BLOCK INTRODUCTION B V 1 2 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 492: ...V DMA BLOCK IDMA Intelligent DMA B V 3 18 EPSON S1C33L03 FUNCTION PART THIS PAGE IS BLANK ...
Page 493: ...S1C33L03 FUNCTION PART VI SDRAM CONTROLLER BLOCK ...
Page 494: ......
Page 531: ...S1C33L03 FUNCTION PART VII LCD CONTROLLER BLOCK ...
Page 532: ......
Page 579: ...S1C33L03 FUNCTION PART Appendix I O MAP ...
Page 580: ......