Features • • • • • • • • • Single Supply for Read and Write: 2.7V to 3.6V (BV), 3.0V to 3.6V (LV) Fast Read Access Time - 110 ns Internal Program Control and Timer 16K bytes Boot Block With Lockout Fast Erase Cycle Time - 10 seconds Byte-By-Byte Programming - 30 µs/Byte Typical Hardware Data Protection DATA Polling For End Of Program Detection Low Power Dissipation – 25 mA Active Current – 50 µA CMOS Standby Current • Typical 10,000 Write Cycles Description The AT49BV/LV008 is a 3-volt-only in-system Flash Memory device. Its 8 megabits of memory is organized as 1,024,576 words by 8 bits. Manufactured with Atmel’s advanced nonvolatile CMOS technology, the device offers access times to 110 ns with power dissipation of just 90 mW over the commercial temperature range. When the device is deselected, the CMOS standby current is less than 50 µA. (continued) 8-Megabit (1M x 8) 3-volt Only Flash Memory AT49BV008 AT49LV008 Pin Configurations Pin Name Function A0 - A19 Addresses CE Chip Enable OE Output Enable WE Write Enable RESET Reset RDY/BUSY Ready/Busy Output I/O0 - I/O7 Data Inputs/Outputs NC No Connect TSOP Top VIew Type 1 A16 A15 A14 A13 A12 A11 A9 A8 WE RESET NC RDY/BUSY A18 A7 A6 A5 A4 A3 A2 A1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 A17 GND NC A19 A10 I/O7 I/O6 I/O5 I/O4 VCC VCC NC I/O3 I/O2 I/O1 I/O0 OE GND CE A0 AT49BV/LV008 8-Megabit 1M x 8 3-volt Only Rev. 1043A–03/98 1 To allow for simple in-system reprogrammability, the AT49BV/LV008 does not require high input voltages for programming. Three-volt-only commands determine the read and programming operation of the device. Reading data out of the device is similar to reading from an EPROM. Reprogramming the AT49BV/LV008 is performed by erasing the entire 8 megabits of memory and then programming on a byte-by-byte basis. The typical byte programming time is a fast 30 µs. The end of a program cycle can be optionally detected by the DATA polling feature. Once the end of a byte program cycle has been detected, a new access for a read or program can begin. The typical number of program and erase cycles is in excess of 10,000 cycles The optional 16K bytes boot block section includes a reprogramming write lock out feature to provide data integrity. The boot sector is designed to contain user secure code, and when the feature is enabled, the boot sector is permanently protected from being reprogrammed. Block Diagram DATA INPUTS/OUTPUTS I/O7 - I/O0 VCC GND OE WE CE ADDRESS INPUTS 8 OE, CE, AND WE LOGIC DATA LATCH INPUT/OUTPUT BUFFERS Y DECODER Y-GATING X DECODER MAIN MEMORY (1008K BYTES) FFFFFH 03FFFH OPTIONAL BOOT BLOCK (16K BYTES) 00000H Device Operation READ: The AT49BV/LV008 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. ERASURE: Before a byte can be reprogrammed, the 1024K bytes memory array (or 1008K bytes if the boot block featured is used) must be erased. The erased state of the memory bits is a logical “1”. The entire device can be erased at one time by using a 6-byte software code. The software chip erase code consists of 6-byte load commands to specific address locations with a specific data pattern (please refer to the Chip Erase Cycle Waveforms). After the software chip erase has been initiated, the device will internally time the erase operation so that no external clocks are required. The maximum time needed to erase the whole chip is tEC. If the boot block lockout feature has been enabled, the data in the boot sector will not be erased. BYTE PROGRAMMING: Once the memory array is erased, the device is programmed (to a logical “0”) on a byte-by-byte basis. Please note that a data “0” cannot be 2 AT49BV/LV008 programmed back to a “1”; only erase operations can convert “0”s to “1”s. Programming is accomplished via the internal device command register and is a 4 bus cycle operation (please refer to the Command Definitions table). The device will automatically generate the required internal program pulses. The program cycle has addresses latched on the falling edge of WE or CE, whichever occurs last, and the data latched on the rising edge of WE or CE, whichever occurs first. Programming is completed after the specified tBP cycle time. The DATA polling feature may also be used to indicate the end of a program cycle. BOOT BLOCK PROGRAMMING LOCKOUT: The device has one designated block that has a programming lockout feature. This feature prevents programming of data in the designated block once the feature has been enabled. The size of the block is 16K bytes. This block, referred to as the boot block, can contain secure code that is used to bring up the system. Enabling the lockout feature will allow the boot code to stay in the device while data in the rest of the device is updated. This feature does not have to be activated; the boot block’s usage as a write protected region is optional to the user. The address range of the AT49BV/LV008 boot block is 00000H to 03FFFH. AT49BV/LV008 To activate the lockout feature, a series of six program commands to specific addresses with specific data must be performed. Please refer to the Command Definitions table. BOOT BLOCK LOCKOUT DETECTION: A software method is available to determine if programming of the boot block section is locked out. When the device is in the software product identification mode (see Software Product Identification Entry and Exit sections) a read from address location 00002H will show if programming the boot block is locked out. If the data on I/O0 is low, the boot block can be programmed; if the data on I/O0 is high, the program lockout feature has been activated and the block cannot be programmed. The software product identification exit code should be used to return to standard operation. BOOT BLOCK PROGRAMMING LOCKOUT OVERRIDE: The user can override the boot block programming lockout by taking the RESET pin to 12V ± 0.5V. By doing this, protected boot block data can be altered through a chip erase, or byte programming. When the RESET pin is brought back to TTL levels, the boot block programming lockout feature is again active. 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. 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 AT49BV/LV008 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 AT49BV/LV008 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. RDY/BUSY: An open drain READY/BUSY output pin provides another method of detecting the end of a program or erase operation. RDY/BUSY is actively pulled low during the internal program and erase cycles and is released at the completion of the cycle. The open drain connection allows for OR - tying of several devices to the same RDY/BUSY line. RESET: A RESET input pin is provided to ease some system applications. When RESET is at a logic high level, the device is in its standard operating mode. A low level on the RESET input halts the present device operation, puts the outputs of the device in a high impedance state, and reduces the current drawn by the part to a minimum. If the RESET pin makes a high to low transition during a program or erase operation, the operation may not be successfully completed and the operation will have to be repeated after a high level is applied to the RESET pin. When a high level is reasserted on the RESET pin, the device returns to the read or standby mode, depending upon the state of the control inputs. By applying a 12V ± 0.5V input signal to the RESET pin, the boot block array can be reprogrammed even if the boot block lockout feature has been enabled (see Boot Block Programming Lockout Override section). HARDWARE DATA PROTECTION: Hardware features protect against inadvertent programs to the AT49BV/LV008 in the following ways: (a) VCC sense: if VCC is below 1.8V (typical), the program function is inhibited. (b) Program inhibit: holding any one of OE low, CE high or WE high inhibits program cycles. (c) Noise filter: pulses of less than 15 ns (typical) on the WE or CE inputs will not initiate a program cycle. 3 Command Definition (in Hex) Command Sequence 1st Bus Cycle Bus Cycles Addr Data Read 1 Addr DOUT Chip Erase 6 5555 Byte Program 4 Boot Block Lockout(1) 2nd Bus Cycle 3rd Bus Cycle 4th Bus Cycle 5th Bus Cycle 6th Bus Cycle Addr Data Addr Data Addr Data Addr Data Addr Data AA 2AAA 55 5555 80 5555 AA 2AAA 55 5555 10 5555 AA 2AAA 55 5555 A0 Addr DIN 6 5555 AA 2AAA 55 5555 80 5555 AA 2AAA 55 5555 40 Product ID Entry 3 5555 AA 2AAA 55 5555 90 (2) 3 5555 AA 2AAA 55 5555 F0 (2) 1 XXXX F0 Product ID Exit Product ID Exit Notes: 1. The 16K byte boot sector has the address range 00000H to 03FFFH. 2. Either one of the Product ID Exit commands can be used. 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 OE with Respect to Ground ...................................-0.6V to +13.5V 4 AT49BV/LV008 *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. AT49BV/LV008 DC and AC Operating Range Com. Operating Temperature (Case) Ind. VCC Power Supply AT49LV008-11 AT49BV/LV008-12 AT49BV008-15 0°C - 70°C 0°C - 70°C 0°C - 70°C -40°C - 85°C -40°C - 85°C -40°C - 85°C 3.0V - 3.6V 2.7V - 3.6V/3.0V - 3.6V 2.7V - 3.6V Operating Modes Mode CE OE WE RESET Ai I/O RDY/BUSY VIL VIL VIH VIH Ai DOUT VOH VIL VIH VIL VIH Ai DIN VOL Standby/Write Inhibit VIH X(1) X VIH X High Z VOH Program Inhibit X X VIH VIH VOH Program Inhibit X VIL X VIH VOH Output Disable X VIH X VIH RESET X X X VIL X High Z VIL VIL VIH VIH A1 - A19 = VIL, A9 = VH,(3) A0 = VIL Manufacturer Code(4) A1 - A19 = VIL, A9 = VH,(3) A0 = VIH Device Code(4) A0 = VIL, A1 - A19 = VIL Manufacturer Code(4) A0 = VIH, A1 - A19 = VIL Device Code(4) Read Program (2) High Z VOH Product Identification Hardware Software(5) Notes: 1. X can be VIL or VIH. 2. Refer to AC Programming Waveforms. 3. VH = 12.0V ± 0.5V 4. Manufacturer Code: 1FH Device Code: 22H 5. See details under Software Product Identification Entry/Exit. DC Characteristics Symbol Parameter Condition ILI Input Load Current ILO Max Units VIN = 0V to VCC 1 µA Output Leakage Current VI/O = 0V to VCC 1 µA IPD Power Down Current RESET = GND ± 0.2V 50 µA ISB1 VCC Standby Current CMOS CE = VCC - 0.3V to VCC 50 µA ISB2 VCC Standby Current TTL CE = 2.0V to VCC 1 mA ICC(1) VCC Active Current f = 5 MHz; IOUT = 0 mA 25 mA VIL Input Low Voltage 0.6 V VIH Input High Voltage VOL Output Low Voltage IOL = 2.1 mA VOH1 Output High Voltage IOH = -400 µA Note: Min 2.0 V 0.45 2.4 V V 1. ICC in the erase mode is 50 mA. 5 AC Read Characteristics AT49LV008-11 Symbol Parameter tACC Min AT49BV/LV008-12 Max Min AT49BV008-15 Max Min Max Units Address to Output Delay 110 120 150 ns (1) CE to Output Delay 110 120 150 ns tOE(2) OE to Output Delay 0 50 0 50 0 70 ns tDF(3)(4) CE or OE to Output Float 0 30 0 30 0 40 ns tOH Output Hold from OE, CE or Address, whichever occurred first 0 tRO RESET to Output Delay tCE 0 0 800 ns 800 800 ns AC Read Waveforms ADDRESS ADDRESS VALID CE tCE tOE OE tDF tACC tRO RESET HIGH Z OUTPUT Notes: tOH OUTPUT VALID 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 3.0V 2.4V AC DRIVING LEVELS 1.5V 0.4V AC MEASUREMENT LEVEL 1.8K OUTPUT PIN tR, tF < 5 ns 1.3K 100 pF Pin Capacitance (f = 1 MHz, T = 25 C) Typ Max Units Conditions CIN 4 6 pF VIN = 0V COUT 8 12 pF VOUT = 0V Note: 6 1. This parameter is characterized and is not 100% tested. AT49BV/LV008 AT49BV/LV008 AC Byte Load Characteristics Symbol Parameter Min Max Units tAS, tOES Address, OE Set-up Time 0 ns tAH Address Hold Time 50 ns tCS Chip Select Set-up Time 0 ns tCH Chip Select Hold Time 0 ns tWP Write Pulse Width (WE or CE) 90 ns tDS Data Set-up Time 50 ns tDH, tOEH Data, OE Hold Time 0 ns tWPH Write Pulse Width High 90 ns AC Byte Load Waveforms WE Controlled OE tOES tOEH ADDRESS tAS tAH tCH CE tCS WE tWP tDS tWPH tDH DATA IN CE Controlled OE tOES tOEH ADDRESS tAS tAH tCH WE tCS CE tWP tDS tWPH tDH DATA IN 7 Program Cycle Characteristics Symbol Parameter Min Typ Max Units tBP Byte Programming Time 30 50 µs tAS Address Set-up Time 0 ns tAH Address Hold Time 50 ns tDS Data Set-up Time 50 ns tDH Data Hold Time 0 ns tWP Write Pulse Width 90 ns tWPH Write Pulse Width High 90 ns tEC Erase Cycle Time 10 Program Cycle Waveforms PROGRAM CYCLE OE CE tWP tWPH tBP WE tAS A0-A19 tAH 5555 tDH 2AAA 5555 ADDRESS tDS AA DATA 55 INPUT DATA A0 Chip Erase Cycle Waveforms OE CE tWP tWPH WE tAS A0-A19 tAH 5555 tDH 2AAA 5555 5555 2AAA 5555 tDS DATA Note: 8 tEC AA 55 80 AA 55 10 BYTE 0 BYTE 1 BYTE 2 BYTE 3 BYTE 4 BYTE 5 OE must be high only when WE and CE are both low. AT49BV/LV008 seconds AT49BV/LV008 Data Polling Characteristics(1) Symbol Parameter tDH Data Hold Time 10 ns tOEH OE Hold Time 10 ns tOE OE to Output Delay(2) tWR Write Recovery Time Notes: Min Typ Max Units ns 0 ns 1. These parameters are characterized and not 100% tested. 2. See tOE spec in AC Read Characteristics. Data Polling Waveforms WE CE tOEH OE tDH tOE tWR HIGH Z I/O7 A0-A19 An An An An An Toggle Bit Characteristics(1) Symbol Parameter tDH Data Hold Time 10 ns tOEH OE Hold Time 10 ns tOE OE to Output Delay(2) tOEHP OE High Pulse tWR Write Recovery Time Notes: Min 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. Toggle Bit Waveforms(1)(2)(3) WE CE tOEH tOEHP OE tDH I/O6 Notes: tOE tWR HIGH Z 1. Toggling either OE or CE or both OE and CE will operate toggle bit. The tOEHP specification must be met by the toggling input(s). 2. Beginning and ending state of I/O6 will vary. 3. Any address location may be used but the address should not vary. 9 Software Product Identification Entry(1) LOAD DATA AA TO ADDRESS 5555 Boot Block Lockout Feature Enable Algorithm(1) LOAD DATA AA TO ADDRESS 5555 LOAD DATA 55 TO ADDRESS 2AAA LOAD DATA 55 TO ADDRESS 2AAA LOAD DATA 90 TO ADDRESS 5555 LOAD DATA 80 TO ADDRESS 5555 ENTER PRODUCT IDENTIFICATION MODE(2)(3)(5) LOAD DATA AA TO ADDRESS 5555 Software Product Identification Exit(1) LOAD DATA AA TO ADDRESS 5555 OR LOAD DATA 55 TO ADDRESS 2AAA LOAD DATA 55 TO ADDRESS 2AAA LOAD DATA F0 TO ANY ADDRESS LOAD DATA 40 TO ADDRESS 5555 EXIT PRODUCT IDENTIFICATION MODE(4) PAUSE 1 second(2) LOAD DATA F0 TO ADDRESS 5555 EXIT PRODUCT IDENTIFICATION MODE(4) Notes: 10 1. Data Format: I/O7 - I/O0 (Hex); Address Format: A14 - A0 (Hex). 2. A1 - A19 = VIL. Manufacture 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. 5. Manufacturers Code: 1FH Device Code: 22H AT49BV/LV008 Notes: 1. Data Format: I/07 - I/O0 (Hex); Address Format: A14 - A0 (Hex). 2. Boot block lockout feature enabled. AT49BV/LV008 Ordering Information ICC (mA) tACC (ns) Active Standby 120 25 150 110 120 Ordering Code Package Operation Range 0.05 AT49BV008-12TC 40T Commercial (0° to 70°C) 25 0.05 AT49BV008-12TI 40T Industrial (-40° to 85°C) 25 0.05 AT49BV008-15TC 40T Commercial (0° to 70°C) 25 0.05 AT49BV008-15TI 40T Industrial (-40° to 85°C) 25 0.05 AT49LV008-11TC 40T Commercial (0° to 70°C) 25 0.05 AT49LV008-11TI 40T Industrial (-40° to 85°C) 25 0.05 AT49LV008-12TC 40T Commercial (0° to 70°C) 25 0.05 AT49LV008-12TI 40T Industrial (-40° to 85°C) Pakage Type 40T 40-Lead, Thin Small Outline Package (TSOP) 11 Packaging Information 40T, 40-Lead, Plastic Thin Small Outline Package (TSOP) Dimensions in Millimeters and (Inches)* 1.030(26.16) 1.020(25.91) .009(.231) .004(.102) *Controlling dimension: millimeters © Atmel Corporation 1998. Atmel Cor poration 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 website. 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 proper ty 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 suppor t devices or systems. Atmel Headquar ters, 2325 Orchard Parkway, San Jose, CA 95131, TEL (408) 441-0311, FAX (408) 487-2600 Atmel Colorado Springs, 1150 E. Cheyenne Mtn. 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