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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

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

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

Pulse width WRN or RDN

20

ns

Setup time D15-0 to end of write access

10

ns

Hold time D15-0 after end of write access

5

ns

Delay WRN or RDN (begin of write access) to BUSYN low

15

ns

Setup time BUSYN high to end of write access

15

ns

WRN and RDN high after end of write access

15

ns

A10-0, BHEN,

MCSN0-1,

WRN (Motorola mode)

WRN (Intel mode)

RDN (Motorola mode)

D15-0

BUSYN