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ST6260BB3 Folha de dados(PDF) 8 Page - STMicroelectronics |
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ST6260BB3 Folha de dados(HTML) 8 Page - STMicroelectronics |
8 / 75 page 8/75 ST62T53B/T60B/T63B ST62E60B MEMORY MAP (Cont’d) 1.3.2 Program Space Program Space comprises the instructions to be executed, the data required for immediate ad- dressing mode instructions, the reserved factory test area and the user vectors. Program Space is addressed via the 12-bit Program Counter register (PC register). 1.3.2.1 Program Memory Protection The Program Memory in OTP or EPROM devices can be protected against external readout of mem- ory by selecting the READOUT PROTECTION op- tion in the option byte. Figure 4. ST62E60B/T60B Program Memory Map In the EPROM parts, READOUT PROTECTION option can be disactivated only by U.V. erasure that also results into the whole EPROM context erasure. Note: Once the Readout Protection is activated, it is no longer possible, even for SGS-THOMSON, to gain access to the OTP contents. Returned parts with a protection set can therefore not be ac- cepted. Figure 5. ST62T53B/T63B Program Memory Map 0000h RESERVED* USER PROGRAM MEMORY (OTP/EPROM) 3872 BYTES 0F9Fh 0FA0h 0FEFh 0FF0h 0FF7h 0FF8h 0FFBh 0FFCh 0FFDh 0FFEh 0FFFh RESERVED* RESERVED INTERRUPT VECTORS NMI VECTOR USER RESET VECTOR 0080h (*) Reserved areas should be filled with 0FFh 007Fh 0000h RESERVED* USER PROGRAM MEMORY (OTP) 1824 BYTES 0F9Fh 0FA0h 0FEFh 0FF0h 0FF7h 0FF8h 0FFBh 0FFCh 0FFDh 0FFEh 0FFFh RESERVED* RESERVED INTERRUPT VECTORS NMI VECTOR USER RESET VECTOR 087Fh (*) Reserved areas should be filled with 0FFh 0880h 8 |
Nº de peça semelhante - ST6260BB3 |
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Descrição semelhante - ST6260BB3 |
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