General Description
The A29L320A is a 32Mbit, 3.3 volt-only Flash memory organized as 2,097,152 words of 16 bits or 4,194,304 bytes of 8 bits each. The 8 bits of data appear on I/O0 - I/O7; the 16 bits of data appear on I/O0~I/O15. The A29L320A is offered in 48-ball TFBGA and 48-Pin TSOP packages. This device is designed to be programmed in-system with the standard system 3.3 volt VCC supply. Additional 12.0 volt VPP is not required for in-system write or erase operations. However, the A29L320A can also be programmed in standard EPROM programmers.
The A29L320A 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 A29L320A has a second toggle bit, I/O2, to indicate whether the addressed sector is being selected for erase. The A29L320A also offers the ability to program in the Erase Suspend mode. The standard A29L320A offers access times of 70,80,90 and 120ns, 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 3.3 volt power supply for both read and write functions. Internally generated and regulated voltages are provided for the program and erase operations.
The A29L320A 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. The Unlock Bypass mode facilitates faster programming times by requiring only two write cycles to program data instead of four.
The host system can detect whether a program or erase operation is complete by observing the RY / BY pin, or by reading the I/O7 (Data Polling) and I/O6 (toggle) status bits.
After a program or erase cycle has been completed, the device is ready to read array data or accept another command. The sector erase architecture allows memory sectors to be erased and reprogrammed without affecting the data contents of other sectors. The A29L320A is fully erased when shipped from the factory.
The hardware sector protection feature disables operations for both program and erase in any combination of the sectors of memory. This can be achieved via programming equipment.
The Erase Suspend/Erase Resume feature enables the user to put erase on hold for any period of time to read data from, or program data to, any other sector that is not selected for erasure. True background erase can thus be achieved.
The hardware RESET pin terminates any operation in progress and resets the internal state machine to reading array data. The RESET pin may be tied to the system reset circuitry. A system reset would thus also reset the device, enabling the system microprocessor to read the boot-up firmware from the Flash memory.
The device offers two power-saving features. When addresses have been stable for a specified amount of time, the device enters the automatic sleep mode. The system can also place the device into the standby mode. Power consumption is greatly reduced in both these modes.

*Single power supply operation
-Regulated voltage range: 2.7 to 3.6 volt read and write operations for compatibility with high performance 3 volt microprocessors
*Access times:
-70/80/90/120 (max.)
-2mA active read current at 1MHz
-10mA active read current at 5MHz
-20 mA typical program/erase current
-500 nA typical CMOS standby or Automatic Sleep Mode current
*Flexible sector architecture
-Eight 8 Kbyte sectors
-Sixty-three 64 kbyte sectors
-Any combination of sectors can be erased
-Supports full chip erase
-Sector protection:
*Unlock Bypass Program Command
-Reduces overall programming time when issuing multiple program command sequence
*Top or bottom boot block configurations available
*Embedded 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 data 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
*CFI (Common Flash Interface) compliant
-Provides device-specific information to the system, allowing host software to easily reconfigure for different Flash devices
*Compatible with JEDEC-standards
-Pinout and software compatible with single-power-supply Flash memory standard
-Superior inadvertent write protection
*Data Polling and toggle bits
-Provides a software method of detecting completion of program or erase operations
*Ready / BUSY pin (RY / BY)
-Provides a hardware 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
*Hardware reset pin (RESET )
-Hardware method to reset the device to reading array data
*WP /ACC input pin
-Write protect ( WP ) function allows protection of two outermost boot sectors, regardless of sector protect status
-Acceleration (ACC) function provides accelerated program times
*Hardware/Software temporary sector block unprotect command allows code changes in previously locked sectors
*Hardware/Software sector protect/unprotect command
*Package options
-48-pin TSOP (I) or 48-ball TFBGA
-All Pb-free (Lead-free) products are RoHS compliant

A29L320ATV-70, A29L320ATV-70U, A29L320ATV-70I, A29L320ATV-70F

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