Epson Research and Development Page 45
Vancouver Design Center
Hardware Functional Specification S1D13504
Issue Date: 01/01/30 X19A-A-002-18
1. If the S1D13504 host interface is disabled, the timing for WAIT# driven low is relative to the
falling edge of CS# or the first positive edge of BCLK after A[20:0] and M/R# become valid,
whichever occurs later.
2. If the S1D13504 host interface is disabled, the timing for D[15:0] driven is relative to the fall-
ing edge of RD0#, RD1# or the first positive edge of BCLK after A[20:0] and M/R# become
valid,
whichever occurs later.
Table 7-5: Generic MPU Interface Asynchronous Timing
Symbol Parameter Min Max Units
TBCLK Bus clock period 25 ns
t1 RD0#, RD1#, WE0#, WE1# low to CS# low 4ns
t2 A[20:0], M/R# valid to RD0#, RD1#, WE0#, WE1# low 0ns
t3 RD0#, RD1#, WE0#, WE1# high to A[20:0], CS#, M/R# invalid and CS# high 0ns
t41CS# low to WAIT# driven low 17ns
t5 RD0#, RD1#, WE0#, WE1# high to WAIT# high impedance 16ns
t6 WE0#, WE1# low to D[15:0] valid (write cycle) 20 ns
t7 D[15:0] hold from WE0#, WE1# high (write cycle) 0ns
t82RD0#, RD1# low to D[15:0] driven (read cycle) 315ns
t9 D[15:0] valid to WAIT# high (read cycle) 0
t10 RD0#, RD1# high to D[15:0] high impedance (read cycle) 210