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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
T
BCLK
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
t4
1
CS# 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
t8
2
RD0#, 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
