EN29SL160 datasheet(9/46 Pages) EON

9 / 46 page

This Data Sheet may be revised by subsequent versions

or modifications due to changes in technical specifications.

EN29SL160

Rev. G, Issue Date: 2008/09/09

USER MODE DEFINITIONS

Word / Byte Configuration

The signal set on the BYTE# Pin controls whether the device data I/O pins DQ15-DQ0 operate in

the byte or word configuration. When the Byte# Pin is set at logic ‘1’, then the device is in word

configuration, DQ15-DQ0 are active and are controlled by CE# and OE#.

On the other hand, if the Byte# Pin is set at logic ‘0’, then the device is in byte configuration, and

only data I/O pins DQ0-DQ7 are active and controlled by CE# and OE#. The data I/O pins DQ8-

DQ14 are tri-stated, and the DQ15 pin is used as an input for the LSB (A-1) address function.

Standby Mode

The EN29SL160 has a CMOS-compatible standby mode, which reduces the current to

< 0.2µA

(typical). It is placed in CMOS-compatible standby when the CE# pin is at VCC ± 0.2. RESET# and

BYTE# pin must also be at CMOS input levels. If CE# and RESET# are held at VIH, but not within

VCC ± 0.2V, the device will be in the standby modes, but the standby current will be greater. The

outputs are in a high-impedance state independent of the OE# input.

Read Mode

The device is automatically set to reading array data after device power-up. No commands are

required to retrieve data. The device is also ready to read array data after completing an Embedded

Program or Embedded Erase algorithm.

After the device accepts an Erase Suspend command, the device enters the Erase Suspend mode.

The system can read array data using the standard read timings, except that if it reads at an address

within erase-suspended sectors, the device outputs status data. After completing a programming

operation in the Erase Suspend mode, the system may once again read array data with the same

exception. See “Erase Suspend/Erase Resume Commands” for more additional information.

The system must issue the reset command to re-enable the device for reading array data if DQ5

goes high, or while in the autoselect mode. See the “Reset Command” additional details.

Output Disable Mode

When the OE# pin is at a logic high level (VIH), the output from the EN29SL260 is disabled. The

output pins are placed in a high impedance state.

Auto Select Identification Mode

The autoselect mode provides manufacturer and device identification, and sector protection

verification, through identifier codes output on DQ15–DQ0. This mode is primarily intended for

programming equipment to automatically match a device to be programmed with its corresponding

programming algorithm. However, the autoselect codes can also be accessed in-system through the

command register.

When using programming equipment, the autoselect mode requires VID ( 9.0 V to 11.0 V) on

address pin A9. Address pins A8, A6, A1, and A0 must be as shown in Autoselect Codes table. In

addition, when verifying sector protection, the sector address must appear on the appropriate

highest order address bits. Refer to the corresponding Sector Address Tables. 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 DQ15–DQ0.

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