NX29F010-35PL Ver la hoja de datos (PDF) - NexFlash -> Winbond Electronics

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NX29F010-35PL

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

NexFlash -> Winbond Electronics 

NX29F010

Standby Mode

In the Standby Mode, current consumption is greatly

reduced, and the outputs are placed in the high impedance

state, independent of the OE input. The system can place

the device in the standby mode when it is not reading or

writing to the device.

The device enters the CMOS standby mode when the CE

pin is held at VCC ± 0.5V. The device enters the TTL standby

mode when CE is held at VIH. The device requires the

standard access time (tCE) before it is ready to read data.

If the device is deselected during erasure or programming,

the device draws active current until the operation is

completed.

Output Disable Mode

When the OE = VIH, the output from the device is disabled

and the output pins are placed in the high-impedance state.

Auto-select Mode

The auto-select mode provides access to the manufacturer

and device equivalent codes, as well as sector protection

verification codes, via the DQ7-DQ0 pins. This mode is

primarily intended for programming equipment to automatically

match a device to be programmed with its corresponding

programming algorithm. However, the auto-select codes

can also be accessed in-system through the command

register.

When using programming equipment, the auto-select mode

requires VID (11.5V to 12.5V) on address pin A9. Address

pins A1 and A0 must be as shown in Auto-select Codes

(High Voltage Method), Table 4. In addition, when verifying

sector protection, the sector address must appear on the

appropriate highest order address bits. Refer to the corre-

sponding Sector Address Table (Table 3). The Command

Definitions table shows the remaining address bits that are

don't care. When all necessary bits have been set as

required, the programming equipment may then read the

corresponding identifier code on DQ7-DQ0.

To access the auto-select codes in-system, the host

system can issue the auto-select command via the

command register, as shown in the Command Definitions

table. This method does not require VID. See "Command

Definitions" for details on using the auto-select mode.

Sector Protection/Unprotection

The hardware sector protection feature disables both pro-

gram and erase operations in any sector. The hardware

sector unprotection feature re-enables both program and

erase operations in previously protected sectors.

Sector protection/unprotection procedure requires a high

voltage (VID) on address pin A9 and the control pins. Details

on this method are provided in a supplement. Contact an

NexFlash representative to obtain a copy of the appropriate

document.

The device is shipped with all sectors unprotected. NexFlash

offers the option of programming and protecting sectors at

its factory prior to shipping the device. Contact a NexFlash

representative for details.

It is possible to determine whether a sector is protected or

unprotected. See "Auto-select Mode" for details.

Table 4. Auto-select Codes (High Voltage Method)

Description

Manufacturer

Equivalent ID

Device

Equivalent ID

Sector Protection

Verification

CE OE WE A16-A14 A13-A10 A9 A8-A2

A1

A0 DQ7-DQ0

L LH

X

X

VID

X

L

L 01 (Hex)

L LH

X

X

VID

X

L

H 20 (Hex)

L LH

SA

X

VID

X

H

L

01H

(protected)

00H

(unprotected)

Note:

1. L = VIL , H = VIH , VID = 11.5 TO 12.5V , SA = ADDRESS SECTOR , X = Don't care.

NexFlash Technologies, Inc.

5

NXPF001F-0600

06/22/00 ©

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