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A29512A
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Part Number: A29512A

Description: The A29512A is a 5.0 volt-only Flash memory organized as 65,535 bytes of 8 bits each. The 64 Kbytes of data are further...

A29512A General Description

The A29512A is a 5.0 volt-only Flash memory organized as 65,535 bytes of 8 bits each. The 64 Kbytes of data are further divided into four sectors for flexible sector erase capability. The 8 bits of data appear on I/O0 - I/O7 while the addresses are input on A0 to A15. The A29512A is offered in 32-pin
PLCC, TSOP, and PDIP packages. This device is designed to be programmed in-system with the standard system 5.0 volt VCC supply. Additional 12.0 volt VPP is not required for in-system write or erase operations. However, the A29512A can also be programmed in standard EPROM programmers.

The A29512A has the first toggle bit, I/O6, which indicates whether an Embedded Program or Erase is in progress, or it is in the Erase Suspend. Besides the I/O6 toggle bit, the A29512A has a second toggle bit, I/O2, to indicate whether the addressed sector is being selected for erase. The A29512A also offers the ability to program in the Erase Suspend mode. The standard A29512A offers access times of 55, 70 and 90 ns allowing high-speed microprocessors to operate without wait states. To eliminate bus contention the device has separate chip enable (CE ), write enable (WE ) and output enable (OE ) controls.

The device requires only a single 5.0 volt power supply for both read and write functions. Internally generated and regulated voltages are provided for the program and erase operations.

The A29512A is entirely software command set compatible with the JEDEC single-power-supply Flash standard. Commands are written to the command register using standard microprocessor write timings. Register contents serve as input to an internal state-machine that controls the erase and programming circuitry. Write cycles also internally latch addresses and data needed for the programming and erase operations. Reading data out of the device is similar to reading from other Flash or EPROM devices.

Device programming occurs by writing the proper program command sequence. This initiates the Embedded Program algorithm - an internal algorithm that automatically times the program pulse widths and verifies proper program margin. Device erasure occurs by executing the proper erase command sequence. This initiates the Embedded Erase algorithm - an internal algorithm that automatically preprograms the array (if it is not already programmed)
before executing the erase operation. During erase, the device automatically times the erase pulse widths and verifies proper erase margin.

A29512A Maximum Ratings

Ambient Operating Temperature . . . . ....... -55°C to + 125°C
Storage Temperature . . . . . . . . . . . . . ...... -65°C to + 125°C
Ground to V_CC . . . . . . . . . . . . . . . . . . . . . . .........-2.0V to 7.0V
Output Voltage (Note 1) . . . . . . . . . . . . . . ......... -2.0V to 7.0V
A9 & OE (Note 2) . . . . . . . . . . . . . . . . . . . .........-2.0V to 12.5V
All other pins (Note 1) . . . . . . . . . . . . . . . . . .......-2.0V to 7.0V
Output Short Circuit Current (Note 3) . . . . . . . . . ........ 200mA

A29512A Features

5.0V ± 10% for read and write operations
Access times:
    - 55/70/90 (max.)
Current:
   - 20 mA typical active read current
   - 30 mA typical program/erase current
   - 1 mA typical CMOS standby n Flexible sector architecture
   - 32 Kbyte X 2 sectors
   - Any combination of sectors can be erased
   - Supports full chip erase
   - Sector protection: A hardware method of protecting sectors to prevent any inadvertent program or erase operations within that sector
Embedded Erase Algorithms
   - Embedded Erase algorithm will automatically erase the entire chip or any combination of designated sectors and verify the erased sectors
   - Embedded Program algorithm automatically writes and verifies bytes at specified addresses
Typical 100,000 program/erase cycles per sector
20-year data retention at 125°C
   - Reliable operation for the life of the system
Compatible with JEDEC-standards
- Pinout and software compatible with single-powersupply Flash memory standard
- Superior inadvertent write protection
Data Polling and toggle bits
   - Provides a software method of detecting completion of program or erase operations
Erase Suspend/Erase Resume
   - Suspends a sector erase operation to read data from, or program data to, a non-erasing sector, then resumes the erase operation
Package options
   - 32-pin P-DIP, PLCC, or TSOP(Forward type)

A29512A Connection Diagram

A29512A datasheet

A29512A
PDF/DataSheet Download

Datasheet: A29512A
File Size: 301038 KB
Manufacturer: AMICC [AMIC Technology]
Click here to Download

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