Epson CMOS 32-Bit Single Chip Microcomputer S1C33L03 Technical Manual page 140

APPENDIX A <REFERENCE> EXTERNAL DEVICE INTERFACE TIMINGS
SRAM: 55ns, CPU: 20MHz, read cycle
BCLK
A[23:0]
#CEx
#RD
RD data
D[15:0]
SRAM: 55ns, CPU: 20MHz, write cycle
BCLK
A[23:0]
#CEx
#WR
D[15:0]
WR data
EPSON
A-124 S1C33L03 PRODUCT PART