FLASH

AS29F010

Micross Components reserves the right to change products or specifications without notice.

12

AS29F010

Rev. 2.6 11/10

After writing a sector erase command sequence, the

system may read DQ3 to determine whether or not an erase

operation has begun. (The sector erase timer does not apply to

the chip erase command.) If additional sectors are selected for

erasure, the entire time-out also applies after each additional

sector erase command. When the time-out is complete, DQ3

switches from “0” to “1.” The system may ignore DQ3 if the

system can guarantee that the time between additional sector

erase commands will always be less than 50μs. See also the

“Sector Erase Command Sequence” section.

After the sector erase command sequence is written, the

system should read the status on DQ7 (Data\ Polling) or DQ6

(Toggle Bit I) to ensure the device has accepted the command

sequence, and then read DQ3. If DQ3 is “1”, the internally

controlled erase cycle has begun; all further commands are

ignored until the erase operation is complete. If DQ3 is “0”,

the device will accept additional sector erase commands. To

ensure the command has been accepted, the system software

should check the status of DQ3 prior to and following each

subsequent sector erase command. If DQ3 is high on the

second status check, the last command might not have been

accepted. Table 5 shows the outputs for DQ3.

TABLE 5: WRITE OPERATION STATUS

NOTES:

1. DQ7 requires a valid address when reading status information. Refer to the appropriate subsection for further details.

2. DQ5 switches to ‘1’ when an Embedded Program or Embedded Erase operation has exceeded the maximum timing limits. See “DQ5: Exceeding Timing

Limits” for more information.

DQ7

1

DQ6

DQ5

2

DQ3

Embedded Program Algorithm

DQ7\

Toggle

0

N/A

Embedded Erase Algorithm

0

Toggle

0

1

Reading within Erase Suspended Sector

1

No toggle

0

N/A

Reading within Non-Erase Suspended Sector

Data

Data

Data

Data

Standard

Mode

Erase

Suspend

Mode

OPERATION

*Stresses greater than those listed under “Absolute Maximum Ratings”

may cause permanent damage to the device. This is a stress rating only and

functional operation of the device at these or any other conditions above

those indicated in the operation section of this specification is not implied.

Exposure to absolute maximum rating conditions for extended periods may

affect reliability.

ABSOLUTE MAXIMUM RATINGS*

Ambient Temperature with Power Applied...-55°C to +125°C

Voltage with Respect to Ground

V

CC

V

Storage Temperature......................................-65°C to +125°C

NOTES:

1. Minimum DC voltage on input or I/O pin is -0.5V. During voltage transitions, input

may overshoot V

voltage on input and I/O pins is V

pins may overshoot V

2. Minimum DC voltage on A9 pin is -0.5V. During voltage transitions, A9 pins may

overshoot V

voltage on A9 is +12.5V which may overshoot to 14.0V for periods up to 20ns.

3. No more than one output shorted at a time. Duration of the short circuit should not be

greater than one second.

FIGURE 5: Maximum Negative

Overshoot Waveform

FIGURE 6: Maximum Positive

Overshoot Waveform