AT29C020-90PC Atmel, AT29C020-90PC Datasheet
AT29C020-90PC
Specifications of AT29C020-90PC
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AT29C020-90PC Summary of contents
Page 1
... Five-volt-only commands determine the operation of the device. Reading data out of the device is similar to reading from an EPROM. Reprogramming the AT29C020 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 internally latched, freeing the address and data bus for other operations ...
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... Pin Configurations Pin Name A0 - A17 I/O0 - I/O7 NC 2.1 32-lead PLCC Top View 2.2 32-lead TSOP (Type 1) Top View AT29C020 2 Function Addresses Chip Enable Output Enable Write Enable Data Inputs/Outputs No Connect A14 A13 A11 A10 I/ I/O7 A11 A13 4 29 A14 5 28 A17 ...
Page 3
... Device Operation 4.1 Read The AT29C020 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 high. This dual-line control gives designers flexibility in preventing bus contention ...
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... Toggle Bit In addition to DATA polling the AT29C020 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 ...
Page 5
... These two 8K memory sections are referred to as boot blocks. Secure code which will bring up a system can be contained in a boot block. The AT29C020 blocks are located in the first 8K bytes of memory and the last 8K 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 ...
Page 6
... A17 = A17 = V Condition MHz OUT -400 µ -100 µ 4. AT29C020-90 -40C - 85C 5V±10% I OUT High Z High Z ( Manufacturer Code Device Code Manufacturer Code Device Code IH Min Max 10 10 300 3 40 0.8 2.0 0.45 2.4 4.2 0291S–FLASH–11/08 ...
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... whichever occurs first ( pF This parameter is characterized and is not 100% tested. 0291S–FLASH–11/08 AT29C020-70 Min (1)(2)(3)( after the address transition without impact on t ACC after the falling edge of CE without impact AT29C020 AT29C020-90 Max Min Max ACC after an address change ...
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... Input Test Waveforms and Measurement Level t R 12. Output Test Load 13. Pin Capacitance ( MHz 25°C Symbol Typ OUT Note: 1. This parameter is characterized and is not 100% tested. AT29C020 < Max 6 12 Units Conditions OUT 0291S–FLASH–11/08 ...
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... Chip Select Set-up Time CS t Chip Select Hold Time CH t Write Pulse Width ( Data Set-up Time Data, OE Hold Time DH OEH t Write Pulse Width High WPH 15. AC Byte Load Waveforms 15.1 WE Controlled 15.2 CE Controlled 0291S–FLASH–11/08 AT29C020 Min Max Units 100 ns 9 ...
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... Program Cycle Waveforms Notes through A17 must specify the sector address during each high-to-low transition of WE (or CE must be high when WE and CE are both low. 3. All words that are not loaded within the sector being programmed will be indeterminate. AT29C020 10 Min 100 (1)(2)(3) ...
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... OE must be high when WE and CE are both low. 3. All bytes that are not loaded within the sector being programmed will be indeterminate. 0291S–FLASH–11/08 19. Software Data Protection Disable Algorithm (2) (1)(2)(3) AT29C020 (1) LOAD DATA AA TO ADDRESS 5555 LOAD DATA 55 TO ADDRESS 2AAA ...
Page 12
... AC Read Characteristics. OE 24. Toggle Bit Waveforms Notes: 1. Toggling either both OE and CE will operate toggle bit. 2. Beginning and ending state of I/O6 may vary. 3. Any address location may be used but the address should not vary. AT29C020 12 (1) (1) (1)(2)(3) Min Typ ...
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... The device returns to standard operation mode. 5. Manufacturer Code is 1F. The Device Code is DA. 0291S–FLASH–11/08 27. Boot Block Lockout Feature Enable Algorithm (2)(3)(5) Notes: ( AT29C020 LOAD DATA AA TO ADDRESS 5555 LOAD DATA 55 TO ADDRESS 2AAA LOAD DATA 80 TO ADDRESS 5555 LOAD DATA AA TO ...
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... Active Standby 0.3 32J 32-lead, Plastic J-leaded Chip Carrier (PLCC) 32T 32-lead, Thin Small Outline Package (TSOP) AT29C020 14 Ordering Code Package AT29C020-70JU 32J AT29C020-70TU 32T AT29C020-90JU 32J AT29C020-90TU 32T Package Type Operation Range Industrial (-40 to 85C) 0291S–FLASH–11/08 ...
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... Lead coplanarity is 0.004 (0.102 mm) maximum. 2325 Orchard Parkway San Jose, CA 95131 R 0291S–FLASH–11/08 1.14(0.045 PIN NO. 1 IDENTIFIER TITLE 32J, 32-lead, Plastic J-leaded Chip Carrier (PLCC) AT29C020 0.318(0.0125) 0.191(0.0075 COMMON DIMENSIONS (Unit of Measure = mm) MIN NOM MAX SYMBOL A 3.175 – ...
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... E Notes: 1. This package conforms to JEDEC reference MO-142, Variation BD. 2. Dimensions D1 and E do not include mold protrusion. Allowable protrusion 0.15 mm per side and 0.25 mm per side. 3. Lead coplanarity is 0.10 mm maximum. 2325 Orchard Parkway San Jose, CA 95131 R AT29C020 16 PIN SEATING PLANE A1 TITLE ...
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... Disclaimer: The information in this document is provided in connection with Atmel products. No license, express or implied, by estoppel or otherwise, to any intellectual property right is granted by this document or in connection with the sale of Atmel products. EXCEPT AS SET FORTH IN ATMEL’S TERMS AND CONDI- TIONS OF SALE LOCATED ON ATMEL’S WEB SITE, ATMEL ASSUMES NO LIABILITY WHATSOEVER AND DISCLAIMS ANY EXPRESS, IMPLIED OR STATUTORY WARRANTY RELATING TO ITS PRODUCTS INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT ...