AT29C040A-12 ATMEL Corporation, AT29C040A-12 Datasheet
AT29C040A-12
Available stocks
Related parts for AT29C040A-12
AT29C040A-12 Summary of contents
Page 1
... Supply CMOS and TTL Compatible Inputs and Outputs Description The AT29C040A is a 5-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 up to 100 ns, and a low 220 mW power dissipation. ...
Page 2
... Description (Continued) To allow for simple in-system reprogrammability, the AT29C040A does not require high input voltages for pro- gramming. Five-volt-only commands determine the opera- tion of the device. Reading data out of the device is similar to reading from an EPROM. Reprogramming the AT29C040A is performed on a sector basis; 256-bytes of data are loaded into the device and then simultaneously programmed ...
Page 3
... 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 AT29C040A blocks are lo- cated 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 ...
Page 4
... 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. AT29C040A-10 AT29C040A ...
Page 5
... ACC after the falling 4. This parameter is characterized and is not 100% tested ACC OE . ACC (1) Typ Max AT29C040A AT29C040A-12 AT29C040A-15 Min Max Min Max 120 150 120 150 Output Test Load Units ...
Page 6
... Data Set-up Time Data, OE Hold Time DH OEH t Write Pulse Width High WPH AC Byte Load Waveforms WE Controlled CE Controlled Note complete sector (256-bytes) should be loaded using the waveforms shown in these byte load waveform diagrams. AT29C040A 6 Min 100 (1) Max Units ns ...
Page 7
... WE (or CE must be high when WE and CE are both low. Min 100 ( All bytes that are not loaded within the sector being programmed will be indeterminate. AT29C040A Max Units 150 s ...
Page 8
... MUST BE Software Protected Program Cycle Waveform Notes through A18 must specify the sector address during each high to low transition of WE (or CE) after the software code has been entered. AT29C040A 8 Software Data (1) Protection Disable Algorithm WRITES ENABLED ENTER DATA ...
Page 9
... Min 10 10 (2) 0 (1) Min 10 10 (2) 150 0 ( Beginning and ending state of I/O6 will vary. 3. Any address location may be used but the address specification must be should not vary. AT29C040A Typ Max Typ Max Units Units ...
Page 10
... Manufacture Code is read for Device Code is read for The device does not remain in identification mode if powered down. 4. The device returns to standard operation mode. 5. Manufacturer Code: 1F Device Code: A4 AT29C040A 10 Boot Block Lockout Feature Enable Algorithm ENTER PRODUCT IDENTIFICATION ( MODE LOAD DATA 00 ...
Page 11
... Lead, Thin Small Outline Package (TSOP) Ordering Code Package AT29C040A-10PC 32P6 AT29C040A-10TC 32T AT29C040A-10PI 32P6 AT29C040A-10TI 32T AT29C040A-12PC 32P6 AT29C040A-12TC 32T AT29C040A-12PI 32P6 AT29C040A-12TI 32T AT29C040A-15PC 32P6 AT29C040A-15TC AT29C040A-15PI 32P6 Package Type AT29C040A Operation Range Commercial ( Industrial (- Commercial ( Industrial ...