NX29F010-45PLI データシートの表示（PDF） - NexFlash -> Winbond Electronics

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NX29F010-45PLI

1M-BIT (128K x 8-bit) CMOS, 5.0V Only ULTRA-FAST SECTORED FLASH MEMORY

NexFlash -> Winbond Electronics 

NX29F010

Table 5. Command Definitions

Command(1)

Sequence

1st

Cycles Addr Data

Read(3,4)

1

RA RD

Reset(5)

1 XXXX F0

Auto-select(6)

Manufacturer Equiv. ID 4 5555 AA

Device Equiv. ID 4 5555 AA

Sector Protect

4 5555 AA

Verify(7,8)

Program(9)

4 5555 AA

Chip Erase

6 5555 AA

Sector Erase

6 5555 AA

2nd

Addr Data

2AAA 55

2AAA 55

2AAA 55

2AAA 55

2AAA 55

2AAA 55

Bus Cycles (2)

(Hexadecimal)

3rd

4th

Addr Data Addr Data

5555 90

5555 90

5555 90

5555 A0

5555 80

5555 80

XX00 01

XX01 20

(SA) 00

X02 01

PA PD

5555 AA

5555 AA

5th

6th

Addr Data Addr Data

2AAA 55

2AAA 55

5555 10

SA 30

Notes:

1. Bus Operations are described in Table 2.

2. All command bus cycles are write operations, except when reading array or auto-select data.

3. No unlock or command cycles are required when reading array data.

4. RA = Address of the memory location to be read; RD = Data read from location RA during read operation

5. The Reset command is required to return to reading array data when device is in the auto-select mode, or if DQ5 goes high

(while the device is providing status data).

6. The fourth cycle of the "Auto-select Command Sequence" is a read operation.

7. The data is 00H for an unprotected sector and 01h for a protected sector. See "Auto-select Command Sequence" for more

information.

8. SA = Address of the sector to be verified (in auto-select mode) or erased. Address bits A16-A14 uniquely select any sector

9. PA = Address of the memory location to be programmed. Addresses latch on the falling edge of the WE or CE pulse,

whichever happens later; PD = Data to be programmed at location PA. Data latches on the rising edge of WE or CE pulse,

whichever happens first.

10. Address bit A16 and A15 =x (don't care) for all address commands except for Program Address (PA), Read Address (RA) and

Sector Address (SA).

11. X = Don't Care.

A read cycle at address XX00H or retrieves the manufac-

turer code. A read cycle at address XX01H returns the

device code. A read cycle containing a sector address (SA)

and the address 02H in returns 01H if that sector is

protected, or 00H if it is unprotected. Refer to the Sector

Address tables for valid sector addresses.

The system must write the reset command to exit the

auto-select mode and return to reading array data.

Byte Program Command Sequence

Programming is a four-bus-cycle operation. The program

command sequence is initiated by writing two unlock write

cycles, followed by the program setup command. The pro-

gram address and data are written next, which in turn initiate

the Embedded Program algorithm. The system is not required

to provide further controls or timings. The device automati-

cally provides internally generated program pulses and verify

the programmed cell margin. The Command Definitions Table

(Table 5) shows the address and data requirements for the

byte program command sequence.

When the Embedded Program algorithm is complete, the

device then returns to reading array data and addresses are

no longer latched. The system can determine the status of

the program operation by using DQ7 or DQ6.

See "Write Operation Status" for information on these

status bits.

NexFlash Technologies, Inc.

7

NXPF001F-0600

06/22/00 ©

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