AT29LV020-20 ATMEL [ATMEL Corporation], AT29LV020-20 Datasheet
AT29LV020-20
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AT29LV020-20 Summary of contents
Page 1
... CMOS and TTL Compatible Inputs and Outputs Commercial and Industrial Temperature Ranges Description The AT29LV020 is a 3-volt-only in-system Flash programmable and erasable read only memory (PEROM). Its 2 megabits of memory is organized as 262,144 bytes by 8 bits. Manufactured with Atmel’s advanced nonvolatile CMOS technology, the device offers access times to 200 ns with power dissipation of just 54 mW over the commer- cial temperature range ...
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... The device is programmed on a sector basis byte of data within the sector changed, data for the en- tire 256-byte sector must be loaded into the device. The AT29LV020 automatically does a sector erase prior to loading the data into the sector. An erase command is not required. ...
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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 AT29LV020 blocks are lo- cated 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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... 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. AT29LV020- - 3.3V 0.3V OE ...
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... Input Test Waveforms and Measurement Level < Pin Capacitance ( MHz 25° OUT Note: 1. These parameters are characterized and not 100% tested. AT29LV020-20 Min after the address specified from whichever occurs first pF). ...
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... Data, OE Hold Time DH OEH t Write Pulse Width High WPH AC Byte Load Waveforms WE Controlled CE Controlled Notes: 1. The software data protection commands must be applied prior to byte loads. AT29LV020 4-78 Min 10 100 0 0 200 100 10 200 ( complete sector (256 bytes) should be loaded using these waveforms as shown in the Software Protected Byte Load waveforms (see next page) ...
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... All bytes that are not loaded within the sector being programmed will be indeterminate. (1) Notes for software program code: WRITES ENABLED 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. ENTER DATA (2) 3. 256-bytes of data PROTECT STATE AT29LV020 Max Units 150 s ns loaded ...
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... OE High Pulse OEHP t Write Recovery Time WR Notes: 1. These parameters are characterized and not 100% tested. 2. See t spec in AC Read Characteristics. OE (1, 3) Toggle Bit Waveforms Notes: 1. Toggling either both OE and CE will operate toggle bit. AT29LV020 4-80 (1) Min 10 10 (2) 0 (1) Min Typ 10 10 ...
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... Notes for boot block lockout feature enable: 1. Data Format: I/O7 - I/O0 (Hex); Address Format: A14 - A0 (Hex). EXIT PRODUCT 2. Lockout feature set on lower address boot block. IDENTIFICATION 3. Lockout feature set on higher address boot block. MODE ( AT29LV020 (1) LOAD DATA AA TO ADDRESS 5555 LOAD DATA 55 TO ADDRESS 2AAA LOAD DATA 80 TO ...
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... Lead, Plastic J-Leaded Chip Carrier (PLCC) 32T 32 Lead, Thin Small Outline Package (TSOP) AT29LV020 4-82 Ordering Code Package AT29LV020-20JC 32J AT29LV020-20TC 32T AT29LV020-20JI 32J AT29LV020-20TI 32T AT29LV020-25JC 32J AT29LV020-25TC 32T AT29LV020-25JI 32J AT29LV020-25TI 32T Package Type Operation Range Commercial ( ...