82527

AC Characteristics for 8-Bit Multiplexed Non-Intel Mode (Mode 2)

Symbol

Parameter

Min

Max

8 MHz

16 MHz

4 MHz

10 MHz

2 MHz

8 MHz

Address Valid to AS Low

75 ns

Address Hold after AS Low

10 ns

Data Float after E Low

0 ns

45 ns

E High to Data Valid for Registers 02H

0 ns

45 ns

04H 05H

for Read Cycle with a Previous Write

(for Registers except for 02H 04H 05H)

Data Setup to E Low

30 ns

Input Data Hold after E Low

20 ns

E Low to Output Data Valid on Port 12

E High Time

45 ns

End of Previous Write (Last E Low) to E

Low for a Write Cycle

AS High Time

30 ns

Setup Time of RW

to E High

30 ns

AS Low to E High

20 ns

CS

Low to AS Low

20 ns

E Low to CS

High

0 ns

CLKOUT Period

CLKOUT High Period

NOTES

1 Definition of ‘‘Read Cycle without a Previous Write’’ The time between the falling edge of E (for the previous write cycle)

2 Definition of ‘‘Write Cycle with a Previous Write’’ The time between the falling edge of E (for the previous write cycle) and

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