Rainbow-electronics T89C51CC02 Instrukcja Użytkownika Pobierz pdf (Strona 19)

Rev.A - May 17, 2001 19

Preliminary

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).

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Rainbow-electronics T89C51CC02 Instrukcja Użytkownika Strona 19