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T89C51AC2-RLSI-M Datasheet(PDF) 21 Page - ATMEL Corporation

Part # T89C51AC2-RLSI-M
Description  8-bit MCU with 32K bytes Flash, 10 bits A/D and EEPROM
PDF  117 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

T89C51AC2-RLSI-M Datasheet(HTML) 21 Page - ATMEL Corporation

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Draft.A - March 30, 2001
21
Preview - Confidential
T89C51AC2
7.3.1.3. Hardware security space
The Hardware security space is a part of FM0 and has a size of 1 byte.
The 4 MSB can be read/written by software, the 4 LSB can only be read by software and written by hardware in
parallel mode.
7.3.1.4. Column latches
The column latches, also part of FM0, have a size of full page (128 bytes).
The column latches are the entrance buffers of the three previous memory locations (user array, XROW and
Hardware security byte).



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