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SERCON816

3.5.5 Read Access of Dual Port RAM

Figure 9. Read Access of Dual Port RAM

Notes: 1. Setup time input signals to falling edge RDN (Intel or Motorola mode with low active strobe) or rising edge RDN (Motorola 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)

0ns

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 RDN (Intel Motorola mode with low

active strobe) or falling edge RDN (Motorola mode with high

active strobe)

0ns

Cycle time of RAM read clock

access time RDN to D15-0 valid

+ 30

ns

delay RDN to BUSYN low

15

ns

Delay BUSYN high to D15-0 valid

+ 30

ns

Delay RDN to D15-0 high-Z

20

ns

RDN and WRN high after end of read access

15

ns

A10-0, BHEN,

MCSN0-1,

WRN (Motorola mode)

RDN

D15-0

BUSYN