NX25F011B 查看數據表（PDF） - Unspecified

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NX25F011B

1M-BIT, 2M-BIT, AND 4M-BIT SERIAL FLASH MEMORIES WITH 4-PIN SPI INTERFACE

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NX25F011B

NX25F021B

NX25F041B

Table of Contents

1M-BIT, 2M-BIT, AND 4M-BIT ......................................................................................................................................... 1

SERIAL FLASH MEMORIES WITH 4-PIN SPI INTERFACE .......................................................................................... 1

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

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

FUNCTIONAL OVERVIEW ............................................................................................................................................. 5

Pin Descriptions ....................................................................................................................................................... 5

Package ............................................................................................................................................................... 5

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

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

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

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

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

Hold or Ready/Busy (HOLD or R/B) ...................................................................................................................... 6

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

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

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

Using the SRAM Independent of Flash Memory ................................................................................................... 9

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

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

Write Protect Range and Direction, WR[3:0], WD ................................................................................................ 10

Read Clock Edge, RCE ...................................................................................................................................... 10

Table 2A. Write Protect Range Sector Selection (Hex) ........................................................................................ 11

Table 2B. Write Protect Range Sector Selection (Hex) ........................................................................................ 11

Table 2C. Write Protect Range Sector Selection (Hex) ........................................................................................ 11

HOLD-R/B, HR[1:0] ............................................................................................................................................ 11

Status Register Bit Descriptions ............................................................................................................................. 12

Compare Not Equal, CNE ................................................................................................................................... 12

Power Detect, PD ............................................................................................................................................... 12

Write Enable/Disable, WE................................................................................................................................... 12

Command Set ........................................................................................................................................................ 13

Command Set for the NX25F011B, NX25F021B and NX25F041B Serial Flash Memory ..................................... 15

SERIAL FLASH SECTOR COMMANDS ....................................................................................................................... 16

Read From Sector (52H) ......................................................................................................................................... 16

Read From Sector with Auto Increment (50H) ......................................................................................................... 16

Read From Sector Low Frequency (51H) and .......................................................................................................... 16

Read From Sector Low Frequency with Auto Increment (5BH) ................................................................................ 16

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

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

Write to Sector Through SRAM (F3H) ..................................................................................................................... 18

SERIAL SRAM COMMANDS ....................................................................................................................................... 19

Write to SRAM Command (72H) ............................................................................................................................. 19

Read from SRAM (71H) .......................................................................................................................................... 19

Transfer All of SRAM to Sector (F3H) ..................................................................................................................... 20

Transfer All of Sector to SRAM (53H) ..................................................................................................................... 20

Compare Sector to SRAM (8DH) ............................................................................................................................ 21

CONFIGURATION AND STATUS COMMANDS ............................................................................................................ 21

Read Configuration Register (8CH) ......................................................................................................................... 21

Write Non-Volatile Configuration

Register (8AH) ........................................................................................................................................................ 22

2

NexFlash Technologies, Inc.

PRELIMINARY NXSF016F-1201

12/12/01 ©

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