Epson S1C33L03 Manuel D’Utilisation
APPENDIX A <REFERENCE> EXTERNAL DEVICE INTERFACE TIMINGS
A-118
EPSON
S1C33L03 PRODUCT PART
DRAM: 60ns, CPU: 33MHz, random read/write cycle
2
RAS cycle
CAS cycle
RAS precharge
2
t
RC
t
RAD
t
RAH
t
RCD
t
RAC
t
OAC
t
AA
t
CAC
t
OFF
t
CAS
t
ASC
t
RAS
t
ASR
t
WP
t
RP
2
BCLK
A[11:0]
#RAS
#CAS
#RD
D[15:0](RD)
#WE
D[15:0](WR)
ROW #1
RD data
;;;;;;;;;
;;;;;;;;;
ROW #2
;;;;;
;;;;;
;;;;
;;;;
t
DH
t
DS
WR data
;;;
;;;
COL #1
DRAM: 60ns, CPU: 33MHz, page-mode read/write cycle
2
RAS cycle
CAS cycle
RAS precharge
2
CAS cycle
2
t
PC
t
ACP
t
CP
t
RAS
2
BCLK
A[11:0]
#RAS
#CAS
#RD
D[15:0](RD)
#WE
D[15:0](WR)
ROW #1
RD data
;;;;;;
;;;;;;
;;;;;
;;;;;
RD data
;;;;;
;;;;;
WR data
;;;
;;;
WR data
COL #1
COL #2
DRAM: 60ns, CPU: 33MHz, CAS-before-RAS refresh cycle
1
1
RPC delay
Fixed
Refresh RAS pulse width
3
RAS precharge
2
t
RPC
t
CSR
t
CHR
t
RAS
BCLK
#RAS
#CAS