Rainbow-electronics AT49F1025 Manual do Utilizador descarregar pdf (Página 9)

AT49F1024/1025

0765I–05/01

Program Cycle Waveforms

Main Memory or Chip Erase Cycle Waveforms

Notes: 1. OE must be high only when WE and CE are both low.

2. For chip erase, the address should be 10H. For a main memory erase, the data should be 30H.

Program Cycle Characteristics

Symbol Parameter Min Typ Max Units

Word Programming Time 10 50 µs

Address Setup Time 0 ns

Address Hold Time 50 ns

Data Setup Time 50 ns

Data Hold Time 0 ns

Write Pulse Width 50 ns

WPH

Write Pulse Width High 40 ns

Erase Cycle Time 3 seconds

A0-A15

NOTE 2

55 55

5555

WORD 0

WORD 1 WORD 2

WORD 3

WORD 4

WORD 5

2AAA 2AAA

WPH

A0-A15

DATA

5555

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

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Rainbow-electronics AT49F1025 Manual do Utilizador Página 9