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SERCON816
3.5.7 Write Access to DUAL Port RAM
Figure 11. Write Access to DUAL Port RAM
Notes: 1. Setup time input signals to falling edge WRN (Intel mode) or RDN (Motorola mode with low active strobe) or rising edge RDN (Mo-
torola mode with high active strobe)
Symbol Parameter Min. Typ. Max. Unit
t
ASU
Setup time A11-0, (Note 1) 10 ns
Setup time MCSN0-1, if both signals are activated
simultaneously. (Note 1)
5ns
Setup time MCSN0-1, if one of these both signals is activated
10 ns earlier. (Note 1)
0
Setup time BHEN, WRN (only Motorola mode), (Note 1) 0 ns
t
AHD
hold time A11-0, BHEN, MCSN0-1, WRN (only Motorola
mode) to rising edge of WRN (Intel mode) or RDN (Motorola
mode with low active strobe) or falling edge RDN (Motorola
mode with high active strobe)
0ns
t
MWRW
Pulse width WRN or RDN 20 ns
t
DSU
Setup time D15-0 to end of write access 10 ns
t
DHD
Hold time D15-0 after end of write access 5 ns
t
MBSY
Delay WRN or RDN (begin of write access) to BUSYN low 15 ns
t
MBHWH
Setup time BUSYN high to end of write access 15 ns
t
WR1
WRN and RDN high after end of write access 15 ns
A10-0, BHEN,
MCSN0-1,
WRN (M o to ro l a m o d e )
WRN (Intel mode)
RDN(Motorola mode)
D15-0
BUSYN
t
MBSY
t
MBHWH
t
MWRW
t
DSU
t
DHD
t
WR1
t
ASU
t
AHD
