AS82527 datasheet(9/22 Pages) INTEL

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82527

AC Characteristics for 816-Bit Multiplexed Intel Modes (Modes 0 1)

Conditions VCC e 5V g10% VSS e 0V TA eb40 Cto a125 C CL e 100 pF (Continued)

Symbol

Parameter

Min

Max

Conditions

tWHDV

High to Output Data Valid

tMCLK

2tMCLK a 500 ns

on Port 12

tCOPO

CLKOUT Period

(CDV a 1) tOSC(3)

tCHCL

CLKOUT High Period

(CDV a 1)

tOSC b 10 (CDV a 1)

tOSC a 15

NOTES

References to WR

also pertain to WRH

1 Definition of ‘‘read cycle without a previous write’’ The time between the rising edge of WR

WRH

(for the previous

write cycle) and the falling edge of RD

(for the current read cycle) is greater than 2 tMCLK

2 Definition of ‘‘write cycle with a previous write’’ The time between the rising edge of WR

WRH

(for the previous write

cycle) and the rising edge of WR

WRH

(for the current write cycle) is less than 2 tMCLK

3 Definition of CDV is the value loaded in the CLKOUT register representing the CLKOUT divisor

AC Characteristics for 816-Bit Multiplexed Intel Modes (Modes 0 1)

272250 – 3

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