Features • • • • • • • • • • • • • Single Voltage, Range 3V to 3.6V Supply 3-Volt Only Read and Write Operation Software Protected Programming Fast Read Access Time - 200 ns Low Power Dissipation – 15 mA Active Current – 40 µA CMOS Standby Current Sector Program Operation – Single Cycle Reprogram (Erase and Program) – 2048 Sectors (256 bytes/sector) – Internal Address and Data Latches for 256 Bytes Two 16K Bytes Boot Blocks with Lockout Fast Sector Program Cycle Time - 20 ms Max. Internal Program Control and Timer DATA Polling for End of Program Detection Typical Endurance > 10,000 Cycles CMOS and TTL Compatible Inputs and Outputs Commercial and Industrial Temperature Ranges 4-Megabit (512K x 8) 3-volt Only 256-Byte Sector Flash Memory Description The AT29LV040A is a 3-volt only in-system Flash Programmable and Erasable Read Only Memory (PEROM). Its 4 megabits of memory is organized as 524,288 words by 8 bits. Manufactured with Atmel’s advanced nonvolatile CMOS EEPROM technology, the device offers access times to 200 ns, and a low 54 mW power dissipation. When the device is deselected, the CMOS standby current is less than 40=µA. The device PLCC Top View CE Chip Enable OE Output Enable WE Write Enable I/O0 - I/O7 Data Inputs/Outputs NC No Connect A7 A6 A5 A4 A3 A2 A1 A0 I/O0 4 3 2 1 32 31 30 Addresses 5 6 7 8 9 10 11 12 13 29 28 27 26 25 24 23 22 21 14 15 16 17 18 19 20 A0 - A18 A14 A13 A8 A9 A11 OE A10 CE I/O7 I/O1 I/O2 GND I/O3 I/O4 I/O5 I/O6 Function A12 A15 A16 A18 VCC WE A17 Pin Configurations Pin Name AT29LV040A TSOP Top View Type 1 A11 A9 A8 A13 A14 A17 WE VCC A18 A16 A15 A12 A7 A6 A5 A4 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 OE A10 CE I/O7 I/O6 I/O5 I/O4 I/O3 GND I/O2 I/O1 I/O0 A0 A1 A2 A3 Rev. 0334E–03/01 1 endurance is such that any sector can typically be written to in excess of 10,000 times. The programming algorithm is compatible with other devices in Atmel’s 3-volt only Flash memories. To allow for simple in-system reprogrammability, the AT29LV040A does not require high input voltages for programming. Three-volt-only commands determine the operation of the device. Reading data out of the device is similar to reading from an EPROM. Reprogramming the AT29LV040A is performed on a sector basis; 256 bytes of data are loaded into the device and then simultaneously programmed. During a reprogram cycle, the address locations and 256 bytes of data are captured at microprocessor speed and internally latched, freeing the address and data bus for other operations. Following the initiation of a program cycle, the device will automatically erase the sector and then program the latched data using an internal control timer. The end of a program cycle can be detected by DATA polling of I/O7. Once the end of a program cycle has been detected, a new access for a read or program can begin. Block Diagram Device Operation READ: The AT29LV040A is accessed like an EPROM. When CE and OE are low and WE is high, the data stored at the memory location determined by the address pins is asserted on the outputs. The outputs are put in the high impedance state whenever CE or OE is high. This dual-line control gives designers flexibility in preventing bus contention. SOFTWARE DATA PROTECTION PROGRAMMING: The AT29LV040A has 2048 individual sectors, each 256 bytes. Using the software data protection feature, byte loads are used to enter the 256 bytes of a sector to be programmed. The AT29LV040A can only be programmed or reprogrammed using the software data protection feature. The device is programmed on a sector basis. If a byte of data within the sector is to be changed, data for the entire 256b y t e s e c t o r m u s t b e l o a d e d i n t o t h e d e v i c e . Th e AT29LV040A automatically does a sector erase prior to loading the data into the sector. An erase command is not required. Software data protection protects the device from inadvertent programming. A series of three program commands to specific addresses with specific data must be presented to the device before programming may occur. The same three program commands must begin each program operation. All software program commands must obey the sector program timing specifications. Power transitions will not reset 2 AT29LV040A the software data protection feature, however the software feature will guard against inadvertent program cycles during power transitions. Any attempt to write to the device without the 3-byte command sequence will start the internal write timers. No data will be written to the device; however, for the duration of tWC, a read operation will effectively be a polling operation. After the software data protection’s 3-byte command code is given, a byte load is performed by applying a low pulse on the WE or CE input with CE or WE low (respectively) and OE high. The address is latched on the falling edge of CE or WE, whichever occurs last. The data is latched by the first rising edge of CE or WE. The 256 bytes of data must be loaded into each sector. Any byte that is not loaded during the programming of its sector will be erased to read FFH. Once the bytes of a sector are loaded into the device, they are simultaneously programmed during the internal programming period. After the first data byte has been loaded into the device, successive bytes are entered in the same manner. Each new byte to be programmed must have its high to low transition on WE (or CE) within 150 µs of the low to high transition of WE (or CE) of the preceding byte. If a high to low transition is not detected within 150 µs of the last low to high transition, the load period will end and the internal programming period AT29LV040A will start. A8 to A18 specify the sector address. The sector address must be valid during each high to low transition of WE (or CE). A0 to A7 specify the byte address within the sector. The bytes may be loaded in any order; sequential loading is not required. Once a programming operation has been initiated, and for the duration of tWC, a read operation will effectively be a polling operation. HARDWARE DATA PROTECTION: Hardware features protect against inadvertent programs to the AT29LV040A in the following ways: (a) VCC sense—if VCC is below 1.8V (typical), the program function is inhibited; (b) VCC power on delay—once V CC has reached the V CC sense level, the device will automatically time out 10 ms (typical) before programming; (c) Program inhibit—holding any one of OE low, CE high or WE high inhibits program cycles; and (d) Noise filter—pulses of less than 15 ns (typical) on the WE or CE inputs will not initiate a program cycle. INPUT LEVELS: While operating with a 3.3V ±10% power supply, the address inputs and control inputs (OE, CE and WE) may be driven from 0 to 5.5V without adversely affecting the operation of the device. The I/O lines can only be driven from 0 to 3.6V. PRODUCT IDENTIFICATION: The product identification mode identifies the device and manufacturer as Atmel. It may be accessed by hardware or software operation. The hardware operation mode can be used by an external programmer to identify the correct programming algorithm for the Atmel product. In addition, users may wish to use the software product identification mode to identify the part (i.e. using the device code), and have the system software use the appropriate sector size for program operations. In this manner, the user can have a common board design for 256K to 4-megabit densities and, with each density’s sector size in a memory map, have the system software apply the appropriate sector size. For details, see Operating Modes (for hardware operation) or Software Product Identification. The manufacturer and device code is the same for both modes. DATA POLLING: The AT29LV040A features DATA polling to indicate the end of a program cycle. During a program cycle an attempted read of the last byte loaded will result in the complement of the loaded data on I/O7. Once the program cycle has been completed, true data is valid on all outputs and the next cycle may begin. DATA polling may begin at any time during the program cycle. TOGGLE BIT: In addition to DATA polling the AT29LV040A provides another method for determining the end of a program or erase cycle. During a program or erase operation, successive attempts to read data from the device will result in I/O6 toggling between one and zero. Once the program cycle has completed, I/O6 will stop toggling and valid data will be read. Examining the toggle bit may begin at any time during a program cycle. OPTIONAL CHIP ERASE MODE: The entire device can be erased by using a 6-byte software code. Please see Software Chip Erase application note for details. BO OT BLOCK PROGRAMMING LOCKO UT: The AT29LV040A has two designated memory blocks that have a programming lockout feature. This feature prevents programming of data in the designated block once the feature has been enabled. Each of these blocks consists of 16K bytes; the programming lockout feature can be set independently for either block. While the lockout feature does not have to be activated, it can be activated for either or both blocks. These two 16K memory sections are referred to as boot blocks. Secure code which will bring up a system can be contained in a boot block. The AT29LV040A blocks are located in the first 16K bytes of memory and the last 16K bytes of memory. The boot block programming lockout feature can therefore support systems that boot from the lower addresses of memory or the higher addresses. Once the programming lockout feature has been activated, the data in that block can no longer be erased or programmed; data in other memory locations can still be changed through the regular programming methods. To activate the lockout feature, a series of seven program commands to specific addresses with specific data must be performed. Please see Boot Block Lockout Feature Enable Algorithm. If the boot block lockout feature has been activated on either block, the chip erase function will be disabled. BOOT BLOCK LOCKOUT DETECTION: A software method is available to determine whether programming of either boot block section is locked out. See Software Product Identification Entry and Exit sections. When the device is in the software product identification mode, a read from location 00002H will show if programming the lower address boot block is locked out while reading location FFFF2H will do so for the upper boot block. If the data is FE, the corresponding block can be programmed; if the data is FF, the program lockout feature has been activated and the corresponding block cannot be programmed. The software product identification exit mode should be used to return to standard operation. 3 Absolute Maximum Ratings* Temperature Under Bias................................ -55°C to +125°C Storage Temperature ..................................... -65°C to +150°C All Input Voltages (including NC Pins) with Respect to Ground ...................................-0.6V to +6.25V All Output Voltages with Respect to Ground .............................-0.6V to VCC + 0.6V Voltage on A9 (including NC Pins) with Respect to Ground ...................................-0.6V to +13.5V 4 AT29LV040A *NOTICE: Stresses beyond 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 beyond those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. AT29LV040A DC and AC Operating Range Operating Temperature (Case) AT29LV040A-25 0°C - 70°C 0°C - 70°C -40°C - 85°C -40°C - 85°C 3.3V ± 0.3V 3.3V ± 0.3V Com. Ind. (1) VCC Power Supply Note: AT29LV040A-20 1. After power is applied and VCC is at the minimum specified data sheet value, the system should wait 20 ms before an operational mode is started. Operating Modes Mode CE OE WE Ai I/O Read VIL VIL VIH Ai DOUT Program(2) VIL VIH VIL Ai DIN X High Z Standby/Write Inhibit (1) VIH X X Program Inhibit X X VIH Program Inhibit X VIL X Output Disable X VIH X VIL VIL VIH High Z Product Identification Hardware A1 - A18 = VIL, A9 = VH(3), A0 = VIL Manufacturer Code(4) A1 - A18 = VIL, A9 = VH(3), A0 = VIH Device Code(4) Software(5) Notes: A0 = VI Manufacturer Code(4) A0 = VIH Device Code(4) 1. X can be VIL or VIH. 2. Refer to AC Programming Waveforms. 3. VH = 12.0V ± 0.5V. 4. Manufacturer Code: 1F, Device Code: C4. 5. See details under Software Product Identification Entry/Exit. DC Characteristics Symbol Parameter Condition ILI Input Load Current ILO Min Max Units VIN = 0V to VCC 1 µA Output Leakage Current VI/O = 0V to VCC 1 µA Com. 40 ISB1 VCC Standby Current CMOS CE = VCC - 0.3V to VCC µA Ind. 50 µA ISB2 VCC Standby Current TTL CE = 2.0V to VCC 1 mA ICC VCC Active Current f = 5 MHz; IOUT = 0 mA; VCC = 3.6V 15 mA VIL Input Low Voltage 0.6 V VIH Input High Voltage VOL Output Low Voltage IOL = 1.6 mA; VCC = 3.0V VOH Output High Voltage IOH = -100 µA; VCC = 3.0V 2.0 V .45 2.4 V V 5 AC Read Characteristics AT29LV040A-20 Symbol Parameter tACC Address to Output Delay CE to Output Delay tCE (1) tOE (2) Min AT29LV040A-25 Max Min Max Units 200 250 ns 200 250 ns OE to Output Delay 0 100 0 120 ns tDF(3)(4) CE or OE to Output Float 0 50 0 60 ns tOH Output Hold from OE, CE or Address, whichever occurred first 0 0 ns AC Read Waveforms(1)(2)(3)(4) Notes: 1. CE may be delayed up to tACC - tCE after the address transition without impact on tACC. 2. OE may be delayed up to tCE - tOE after the falling edge of CE without impact on tCE or by tACC - tOE after an address change without impact on tACC. 3. tDF is specified from OE or CE whichever occurs first (CL = 5 pF). 4. This parameter is characterized and is not 100% tested. Input Test Waveforms and Measurement Level Output Test Load tR, tF < 5 ns Pin Capacitance f = 1 MHz, T = 25°C(1) Symbol Typ Max Units Conditions CIN 4 6 pF VIN = 0V COUT 8 12 pF VOUT = 0V Note: 6 1. These parameters are characterized and not 100% tested. AT29LV040A AT29LV040A AC Byte Load Characteristics Symbol Parameter Min Max Units tAS, tOES Address, OE Set-up Time 10 ns tAH Address Hold Time 100 ns tCS Chip Select Set-up Time 0 ns tCH Chip Select Hold Time 0 ns tWP Write Pulse Width (WE or CE) 200 ns tDS Data Set-up Time 100 ns tDH, tOEH Data, OE Hold Time 10 ns tWPH Write Pulse Width High 200 ns AC Byte Load Waveforms(1)(2) WE Controlled CE Controlled Notes: 1. The 3-byte address and data commands shown on the next page must be applied prior to byte loads. 2. A complete sector (256 bytes) should be loaded using these waveforms shown in these byte load waveform diagrams. 7 Program Cycle Characteristics Symbol Parameter Min Max Units tWC Write Cycle Time 20 ms tAS Address Set-up Time 10 ns tAH Address Hold Time 100 ns tDS Data Set-up Time 100 ns tDH Data Hold Time 10 ns tWP Write Pulse Width 200 ns tBLC Byte Load Cycle Time tWPH Write Pulse Width High 150 200 µs ns Software Protected Program Waveform Notes: 1. OE must be high when WE and CE are both low. 2. A8 through A18 must specify the sector address during each high to low transition of WE (or CE) after the software code has been entered. 3. All words that are not loaded within the sector being programmed will be indeterminate. Programming Algorithm(1) LOAD DATA AA TO ADDRESS 5555 LOAD DATA 55 TO ADDRESS 2AAA 8 LOAD DATA A0 TO ADDRESS 5555 WRITES ENABLED LOAD DATA TO SECTOR (256 BYTES)(3) ENTER DATA PROTECT STATE(2) AT29LV040A Notes for software program code: 1. Data Format: I/O7 - I/O0 (Hex); Address Format: A14 - A0 (Hex). 2. Data Protect state will be re-activated at end of program cycle. 3. 256 bytes of data MUST BE loaded. AT29LV040A Data Polling Characteristics(1) Symbol Parameter Min tDH Data Hold Time 10 ns tOEH OE Hold Time 10 ns Max (2) tOE OE to Output Delay tWR Write Recovery Time Notes: Typ Units ns 0 ns 1. These parameters are characterized and not 100% tested. 2. See tOE spec in AC Read Characteristics. Data Polling Waveforms Toggle Bit Characteristics(1) Symbol Parameter Min tDH Data Hold Time 10 ns tOEH OE Hold Time 10 ns (2) tOE OE to Output Delay tOEHP OE High Pulse tWR Notes: Write Recovery Time Typ Max Units ns 150 ns 0 ns 1. These parameters are characterized and not 100% tested. 2. See tOE spec in AC Read Characteristics. Toggling Bit Waveforms(1)(3) Notes: 1. Toggling either OE or CE or both OE and CE will operate toggle bit. 2. Beginning and ending state of I/O6 will vary. 3. Any address location may be used by the address should not vary. 9 Software Product Identification Entry(1) LOAD DATA AA TO ADDRESS 5555 5. Manufacturer Code is 1F. The Device Code is C4. Boot Block Lockout Feature Enable Algorithm(1) LOAD DATA 55 TO ADDRESS 2AAA LOAD DATA AA TO ADDRESS 5555 LOAD DATA 90 TO ADDRESS 5555 LOAD DATA 55 TO ADDRESS 2AAA PAUSE 20 mS LOAD DATA 80 TO ADDRESS 5555 ENTER PRODUCT IDENTIFICATION MODE(2)(3)(5) Software Product Identification Exit(1) LOAD DATA AA TO ADDRESS 5555 LOAD DATA AA TO ADDRESS 5555 LOAD DATA 55 TO ADDRESS 2AAA LOAD DATA 55 TO ADDRESS 2AAA LOAD DATA 40 TO ADDRESS 5555 LOAD DATA F0 TO ADDRESS 5555 PAUSE 20 mS LOAD DATA FF TO ADDRESS FFFFFH(3) PAUSE 20 mS PAUSE 20 mS EXIT PRODUCT IDENTIFICATION MODE(4) Notes for software product identification: 1. Data Format: I/O7 - I/O0 (Hex); Address Format: A14 - A0 (Hex). 2. A1 - A18 = VIL. Manufacturer Code is read for A0 = VIL; Device Code is read for A0 = VIH. 3. The device does not remain in identification mode if powered down. 4. The device returns to standard operation mode. 10 LOAD DATA 00 TO ADDRESS 00000H(2) AT29LV040A Notes for boot block lockout feature enable: 1. Data Format: I/O7 - I/O0 (Hex); Address Format: A14 - A0 (Hex). 2. Lockout feature set on lower address boot block. 3. Lockout feature set on higher address boot block. AT29LV040A Ordering Information ICC (mA) tACC (ns) Active Standby Ordering Code Package 200 15 0.04 AT29LV040A-20TC AT29LV040A-20JC 32T 32J Commercial (0° to 70°C) 15 0.05 AT29LV040A-20TI AT29LV040A-20JI 32T 32J Industrial (-40° to 85°C) 15 0.04 AT29LV040A-25TC AT29LV040A-25JC 32T 32J Commercial (0° to 70°C) 15 0.05 AT29LV040A-25TI AT29LV040A-25JI 32T 32J Industrial (-40° to 85°C) 250 Operation Range Package Type 32J 32-lead, Plastic J-leaded Chip Carrier (PLCC) 32T 32-Lead, Thin Small Outline Package (TSOP) 11 AT29LV040A Packaging Information 32J, 32-lead, Plastic J-leaded Chip Carrier (PLCC) Dimensions in Inches and (Millimeters) JEDEC STANDARD MS-016 AE 32T, 32-Lead, Plastic Thin Small Outline Package (TSOP) Dimensions in Millimeters and (Inches)* JEDEC OUTLINE MO-142 BD .045(1.14) X 45˚ PIN NO. 1 IDENTIFY .025(.635) X 30˚ - 45˚ .012(.305) .008(.203) .553(14.0) .547(13.9) .595(15.1) .585(14.9) .032(.813) .026(.660) .050(1.27) TYP .300(7.62) REF .430(10.9) .390(9.90) AT CONTACT POINTS INDEX MARK .530(13.5) .490(12.4) 18.5(.728) 18.3(.720) .021(.533) .013(.330) .030(.762) .015(.381) .095(2.41) .060(1.52) .140(3.56) .120(3.05) 0.50(.020) BSC 7.50(.295) REF 0.25(.010) 0.15(.006) 8.20(.323) 7.80(.307) .022(.559) X 45˚ MAX (3X) .453(11.5) .447(11.4) .495(12.6) .485(12.3) 20.2(.795) 19.8(.780) 1.20(.047) MAX 0.15(.006) 0.05(.002) 0 5 REF 0.20(.008) 0.10(.004) 0.70(.028) 0.50(.020) 12 Atmel Headquarters Atmel Operations Corporate Headquarters Atmel Colorado Springs 2325 Orchard Parkway San Jose, CA 95131 TEL (408) 441-0311 FAX (408) 487-2600 Europe 1150 E. Cheyenne Mtn. Blvd. Colorado Springs, CO 80906 TEL (719) 576-3300 FAX (719) 540-1759 Atmel Rousset Atmel SarL Route des Arsenaux 41 Casa Postale 80 CH-1705 Fribourg Switzerland TEL (41) 26-426-5555 FAX (41) 26-426-5500 Asia Atmel Asia, Ltd. Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimhatsui East Kowloon Hong Kong TEL (852) 2721-9778 FAX (852) 2722-1369 Japan Zone Industrielle 13106 Rousset Cedex France TEL (33) 4-4253-6000 FAX (33) 4-4253-6001 Atmel Smart Card ICs Scottish Enterprise Technology Park East Kilbride, Scotland G75 0QR TEL (44) 1355-357-000 FAX (44) 1355-242-743 Atmel Grenoble Avenue de Rochepleine BP 123 38521 Saint-Egreve Cedex France TEL (33) 4-7658-3000 FAX (33) 4-7658-3480 Atmel Japan K.K. 9F, Tonetsu Shinkawa Bldg. 1-24-8 Shinkawa Chuo-ku, Tokyo 104-0033 Japan TEL (81) 3-3523-3551 FAX (81) 3-3523-7581 Fax-on-Demand e-mail North America: 1-(800) 292-8635 [email protected] International: 1-(408) 441-0732 http://www.atmel.com Web Site BBS 1-(408) 436-4309 © Atmel Corporation 2001. Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company’s standard warranty which is detailed in Atmel’s Terms and Conditions located on the Company’s web site. The Company assumes no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel’s products are not authorized for use as critical components in life support devices or systems. Marks bearing ® and/or ™ are registered trademarks of Atmel Corporation. Terms and product names in this document may be trademarks of others. Printed on recycled paper. 0334E–03/01/xM