NX26F640C-3T-R データシートの表示（PDF） - NexFlash -> Winbond Electronics

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NX26F640C-3T-R

64M-BIT SERIAL FLASH MEMORY WITH 2-PIN NXS2 INTERFACE

NexFlash -> Winbond Electronics 

NX26F640C

Table of Contents

64M-BIT SERIAL FLASH MEMORY

WITH 2-PIN NXS2 INTERFACE ..................................................................................................................................... 1

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

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

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

Pin Assignments .................................................................................................................................................. 6

Static Address (A0, A1, A2) ................................................................................................................................. 6

Serial Data Input/Output (SIO) ............................................................................................................................. 6

Serial Clock Input (SCK) ...................................................................................................................................... 6

Chip Enable (CE\) ................................................................................................................................................ 6

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

Table 1. Pin Descriptions ..................................................................................................................................... 6

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

Restricted Sector (-R) Devices .............................................................................................................................. 7

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

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

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

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

NXS2 Reset Timing (RST) ................................................................................................................................... 9

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

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

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

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

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

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

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

Data Intergrity Status (DI1, DI0) ........................................................................................................................ 11

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

Table 3: Command Set for the NX26F640C Serial Flash Memory ..................................................................... 13

SERIAL FLASH SECTOR AND SRAM READ COMMANDS ...................................................................................... 15

Transfer Sector to SRAM (5CH and 5DH) ........................................................................................................... 15

Read SRAM (71H and 73H) .................................................................................................................................. 15

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

Write Enable (06H) ............................................................................................................................................... 16

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

Write to Sector Using SRAM (F6H or 98H) ......................................................................................................... 16

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

2

NexFlash Technologies, Inc.

PRELIMINARY NXSF020D-0902

09/05/02 ©

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