P87C151SA datasheet(18/33 Pages) INTEL

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8XC151SASB HIGH-PERFORMANCE CHMOS MICROCONTROLLER

Table 9 AC Characteristics (Capacitive Loading e 50 pF)

(Continued)

Symbol

Parameter

Max FOSC (1)

FOSC Variable

Units

Min

Max

Min

Max

TAVRL (2)

Address Valid to RD

PSEN

Low

12 MHz

1266

(3)

16 MHz

2(1aM)

TOSC b 40

TAVWL1

Address (P0) Valid to WR

Low

12 MHz

1266

(3)

16 MHz

2(1aM)

TOSC b 40

TAVWL2

Address (P2) Valid to WR

Low

12 MHz

1416

(3)

16 MHz

100

2(1aM)

TOSC b25

TWHQX

Data Hold after WR

High

12 MHz

583

16 MHz

375

TOSC b 25

TQVWH

Data Valid to WR

High

12 MHz

1466

(4)

16 MHz

105

2(1aN)

TOSC b 20

TWHAX

High to Address Hold

12 MHz

1466

16 MHz

105

2TOSC b 20

NOTES

1 16 MHz

2 Specifications for PSEN

are identical to those for RD

3 In the formula MeNumber of wait states (0 or 1) for ALE

4 In the formula NeNumber of wait states (0 1 2 or 3) for RD

PSEN

5 ‘‘Typical’’ specifications are untested and not guaranteed

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