AT29C020 ATMEL Corporation, AT29C020 Datasheet
AT29C020
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AT29C020 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 ...
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... 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 ...
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... 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 ...
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... MHz OUT -400 µ -100 µ 4. AT29C020-12 AT29C020-15 0° 70° C 0° 70° C 0° 70° C -40° 85° C -40° 85° ± 10% 5V ± 10 ...
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... ACC after the falling edge of CE without impact AT29C020 AT29C020-10 AT29C020-12 AT29C020-15 Min Max Min Max Min 100 120 100 120 ...
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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 ...
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... 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 0291Q–FLASH–11/05 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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... Data Format: I/O7 - I/O0 (Hex); Address Format: A14 - A0 (Hex). 2. Data Protect state will be activated at end of program cycle. 3. Data Protect state will be deactivated at end of pro- gram period. 4. 256 bytes of data MUST BE loaded. (1)(2)(3) AT29C020 (19.) LOAD DATA AA TO ADDRESS 5555 LOAD DATA 55 TO ADDRESS 2AAA LOAD DATA 80 ...
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... 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 Max ...
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... The device returns to standard operation mode. 5. Manufacturer Code is 1F. The Device Code is DA. 0291Q–FLASH–11/05 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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... AT29C020-90TI 32T AT29C020-10JC 32J AT29C020-10TC 32T AT29C020-10JI 32J AT29C020-10TI 32T AT29C020-12JC 32J AT29C020-12TC 32T AT29C020-12JI 32J AT29C020-12TI 32T AT29C020-15JC 32J AT29C020-15TC 32T AT29C020-15JI 32J AT29C020-15TI 32T Ordering Code Package AT29C020-70JU 32J AT29C020-70TU 32T AT29C020-90JU 32J AT29C020-90TU 32T Package Type Operation Range Commercial (0° ...
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... Lead coplanarity is 0.004" (0.102 mm) maximum. 2325 Orchard Parkway San Jose, CA 95131 R 0291Q–FLASH–11/05 1.14(0.045) X 45˚ 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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... 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 ...
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... Atmel products are not suitable for, and shall not be used in, automotive applications. Atmel’s products are not intended, authorized, or warranted for use as components in applications intended to support or sustain life. © Atmel Corporation 2005. All rights reserved. Atmel marks or trademarks of Atmel Corporation or its subsidiaries. Other terms and product names may be trademarks of others. Atmel Operations Memory ...