T89C51CC02 Atmel, T89C51CC02 Datasheet - Page 19

• Manufacturer Part Number: T89C51CC02
• Description: 8-Bit MCU
• Manufacturer: Atmel

T89C51CC02
7.2.1.3. 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.
7.2.1.4. 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).
Rev.A - May 17, 2001
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Preliminary