AT49BV640S-70CU

AT49BV640S-70CU Datasheet


The AT49BV640S T is a 2.7-volt 32-megabit Flash memory organized as 4,194,304 words of 16 bits each. The memory is divided into 135 sectors for erase operations. The device is offered in a 64-ball CBGA package. The device has CE and OE control signals to avoid any bus contention. This device can be read or reprogrammed using a single power supply, making it ideally suited for in-system programming.

Part Datasheet
AT49BV640S-70CU AT49BV640S-70CU AT49BV640S-70CU (pdf)
Related Parts Information
AT49BV640ST-70CU AT49BV640ST-70CU AT49BV640ST-70CU
PDF Datasheet Preview
• Single Voltage Operation Read/Write 2.65V - 3.6V
• Access Time 70 ns
• Sector Erase Architecture

One Hundred Twenty-seven 32K Word 64K Bytes Main Sectors with Individual Write Lockout

Eight 4K Word 8K Bytes Sectors with Individual Write Lockout
• Fast Word Program Time 10 µs
• Typical Sector Erase Time 32K Word Sectors 700 ms 4K Word Sectors 100 ms
• Suspend/Resume Feature for Erase and Program

Supports Reading and Programming Data from Any Sector by Suspending Erase of a Different Sector

Supports Reading Any Word by Suspending Programming of Any Other Word
• Low-power Operation
10 mA Active 15 µA Standby
• VPP Pin for Write Protection and Accelerated Program Operation
• RESET Input for Device Initialization
• Softlock Sector Protection
• Secure Lock and Freeze Feature
• Top or Bottom Boot Block Configuration Available
• 128-bit Protection Register
• Minimum 100,000 Erase Cycles
• Common Flash Interface CFI
• CBGA Green Pb/Halide-free/RoHS Compliant Packaging

The AT49BV640S T is a 2.7-volt 32-megabit Flash memory organized as 4,194,304 words of 16 bits each. The memory is divided into 135 sectors for erase operations. The device is offered in a 64-ball CBGA package. The device has CE and OE control signals to avoid any bus contention. This device can be read or reprogrammed using a single power supply, making it ideally suited for in-system programming.

In some applications, in addition to the standard softlock sector protection mechanism, a requirement exists to allow for the permanent and irreversible locking of selected regions in the memory. The AT49BV640S T allows the user to permanently lock thirty-eight regions, and once activated these secure regions cannot be altered or erased through Software or Hardware at any time. Once activated, no facility exists to over-ride the secure lock mechanism. The size and the location of the secure regions is determined by the Top or Bottom Boot Block designation. The location of the secure regions is shown on pages 3 -

The secure regions can be locked in any sequence and at any time during normal device operation. Read operations can still be performed on any region that has the secure lock feature enabled. Full read/write operations and standard sector operations including standard Sector locking can be performed on all regions that are not secure locked.
64-megabit 4M x 16 Secure 3-volt Only Memory

AT49BV640S AT49BV640ST

Summary Complete Datasheet under NDA

Not Recommended for New Design

Contact Atmel to discuss the latest design in trends and options

NOTE This is a summary document. The complete document is available under NDA. For more information, please contact your local Atmel sales office.

The AT49BV640S T device also contains a freeze feature that will freeze the lock status of the secure regions. The freeze feature prevents any further locking of the secure regions. If the user requires certain regions to be locked, then these regions must be programmed and locked prior to activation of the freeze command. It is important to note that enabling the freeze feature is irreversible.

Pin Configurations

Pin Name A0 - A21 CE OE WE RESET VPP I/O0 - I/O15 NC VCCQ
64-ball CBGA Top View

Pin Function Addresses Chip Enable Output Enable Write Enable Reset Write Protection and Power Supply for Accelerated Program Operations Data Inputs/Outputs No Connect Output Power Supply
12345678

A A0 A5 A7 VPP A12 VCC A17 A21

B A1 VSS A8 CE A13 NC A18 NC

C A2 A6 A9 A11 A14 NC A19 A20

D A3 A4 A10 RESET NC A15 A16

E I/O8 I/O1 I/O9 I/O3 I/O4 NC I/O15 NC

F NC I/O0 I/010 I/O11 I/O12 NC OE

G NC I/O2 VCCQ I/O5 I/O6 I/O14 WE

H NC VCC VSS I/O13 VSS I/O7 NC
2 AT49BV640S T Summary

Memory Organization AT49BV640S

Secure Region SCR
1 2 3 4 5 6 7 8

Sector SA0 SA1 SA2 SA3 SA4 SA5 SA6 SA7 SA8 SA9 SA10 SA11 SA12 SA13 SA14 SA15 SA16 SA17 SA18 SA19 SA20 SA21 SA22 SA23 SA24 SA25 SA26 SA27 SA28 SA29 SA30 SA31 SA32 SA33 SA34

Size Words
4K 32K
x16 Address Range

A21 - A0 - 00FFF 01000 - 01FFF 02000 - 02FFF 03000 - 03FFF 04000 - 04FFF 05000 - 05FFF 06000 - 06FFF 07000 - 07FFF 08000 - 0FFFF 10000 - 17FFF 18000 - 1FFFF 20000 - 27FFF 28000 - 2FFFF 30000 - 37FFF 38000 - 3FFFF 40000 - 47FFF 48000 - 4FFFF 50000 - 57FFF 58000 - 5FFFF 60000 - 67FFF 68000 - 6FFFF 70000 - 77FFF 78000 - 7FFFF 80000 - 87FFF 88000 - 8FFFF 90000 - 97FFF 98000 - 9FFFF A0000 - A7FFF A8000 - AFFFF B0000 - B7FFF B8000 - BFFFF C0000 - C7FFF C8000 - CFFFF D0000 - D7FFF D8000 - DFFFF

AT49BV640S T Summary

Memory Organization AT49BV640S Continued

Secure Region SCR
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Datasheet ID: AT49BV640S-70CU 518677