EN29LV320
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 EN29LV320 has a CMOS-compatible standby mode, which reduces thecurrent to < 1µA (typical). It
is placed in CMOS-compatible standby when the CE# pin is at VCC ± 0.5. RESET# and BYTE# pin must
also be at CMOS input levels. The device also has a TTL-compatible standby mode, which reduces the
maximum VCC current to < 1mA. It is placed in TTL-compatible standby when the CE# pin is at VIH. When
in standby modes, the outputs are in a high-impedance state independent of the OE# input.
Automatic Sleep Mode
The EN29LV320 has a automatic sleep mode, which minimizes power consumption. The devices will
enter this mode automatically when the states of address bus remain stable for tacc + 30ns. ICC4 in the DC
Characteristics table shows the current specification. With standard access times, the device will output
new data when addresses change.
Read Mode
The device is automatically set to reading array data after device power-up or hardware reset. 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 Sector Erase Suspend command, the device enters the Sector 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 Sector Erase Suspend mode, the system may once again read array data
with the same exception. See “Sector Erase Suspend/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” for additional details.
Output Disable Mode
When the OE# pin is at a logic high level (VIH), the output from the EN29LV320 is disabled. The output
pins are placed in a high impedance state.
Autoselect 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 (10.5 V to 11.5 V) on address pin
A9. Address pins A6, A1, and A0 must be as shown in Autoselect Codes table. In addition, when verifying
This Data Sheet may be revised by subsequent versions
or modifications due to changes in technical specifications.
©2004 Eon Silicon Solution, Inc., www.essi.com.tw
12
Rev. E, Issue Date: 2006/05/16
EON [ EON SILICON SOLUTION INC. ]
