NX25F641C データシートの表示（PDF） - NexFlash -> Winbond Electronics

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NX25F641C

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

NexFlash -> Winbond Electronics 

NX25F641C

Table of Contents

NX25F641C..................................................................................................................................... 1

64M-BIT SERIAL FLASH MEMORY WITH 4-PIN SPI INTERFACE .............................................................................. 1

FEATURES .................................................................................................................................................................... 4

DESCRIPTION ............................................................................................................................................................... 4

Pin Descriptions ..................................................................................................................................................... 6

Serial Data Input (SI) ........................................................................................................................................... 6

Serial Data Output (SO)....................................................................................................................................... 6

Chip Select (CS) .................................................................................................................................................. 6

Write Protect Input (WP) ...................................................................................................................................... 6

Hold , Ready/Busy or No-connect

(Hold, R/B or N/C) ................................................................................................................................................ 6

Power Supply Pins (Vcc and Gnd) ....................................................................................................................... 6

Table 1. Pin Descriptions for the 25F641C ................................................................................................................. 6

Serial Flash Memory Array .................................................................................................................................... 7

Serial SRAM ............................................................................................................................................................ 8

Using the SRAM Independent of Flash Memory .................................................................................................. 8

Write Protection ..................................................................................................................................................... 9

Configuration Register .......................................................................................................................................... 9

Write Protect Range and Direction, WR[3:0], WD ................................................................................................ 9

Read Clock Edge, RCE ....................................................................................................................................... 9

HOLD-R/B, HR[1:0] ........................................................................................................................................... 10

Table 2. Write Protect Range Sector Selection ......................................................................................................... 10

Status Register Bit Descriptions ........................................................................................................................ 10

Ready/Busy Status, BUSY ................................................................................................................................ 10

SRAM Transfer, TR0 and TR1 ............................................................................................................................ 10

Compare Not Equal, CNE .................................................................................................................................. 11

Write Enable/Disable, WE .................................................................................................................................. 11

Power Detect, PD .............................................................................................................................................. 11

Command Set ....................................................................................................................................................... 12

Table 3. Command Set for the NX25F641C Serial Flash Memory ........................................................................... 13

SERIAL FLASH SECTOR AND SRAM READ COMMANDS ...................................................................................... 16

Transfer Sector to SRAM (53H and 56H) ............................................................................................................ 16

Read SRAM (71H and 73H) .................................................................................................................................. 16

Write Disable (04H) .............................................................................................................................................. 16

Write to Sector Using SRAM (F3H or 94H) ......................................................................................................... 16

Write to SRAM Command (72H and 74H) ........................................................................................................... 17

2

NexFlash Technologies, Inc.

PRELIMINARY NXSF032A-0502

05/06/02 ©

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