NX25F640C-3T View Datasheet(PDF) - NexFlash -> Winbond Electronics

Part Name

Description

Manufacturer

NX25F640C-3T

64M-BIT SERIAL FLASH MEMORY WITH 4-PIN SPI INTERFACE

NexFlash -> Winbond Electronics 

NX25F640C

CS

SCK

SI

Idle

C[7:0] Command

S[15:0] Sector Address

C7 C6 C5 C4 C3 C2 C1 C0 0 0 S13 S12 S11 S10 S9 S8 S7 S6 S5 S4 S3 S2 S1 S0

F6H or 98H

SCK

SI

16 Clocks

1st Byte of Data

2nd Byte of Data

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 D2 D1 D0

CS

SCK

SI

n-Bytes of Data

Last Byte of Data

8 Clocks

D7 D6 D5 D4 D3 D2 D1 D0 0 0 0 0 0 0 0 0

tWP Program Time

Figure 10. Write to Sector using SRAM Command Sequence

CS

SCK

SI

Idle

C[7:0] Command

S[15:0] Sector Address

C7 C6 C5 C4 C3 C2 C1 C0 0 0 S13 S12 S11 S10 S9 S8 S7 S6 S5 S4 S3 S2 S1 S0

5CH or 5DH

CS

32 Clocks

tXS Transfer Time

SCK

SI

0 0 0 00 0 0 000 000 0 0 0

SO

15 14 13

2 1 0 15 14 13

*

High Z

Status Register

* Status Register Repeats Every 16 Clocks

Figure 11. Transfer Sector to SRAM Command Sequence

14

NexFlash Technologies, Inc.

PRELIMINARY NXSF022F-0502

05/20/02 ©

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