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ST6209CB3 데이터시트(PDF) 7 Page - STMicroelectronics |
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7 / 70 page 7/70 ST62T08C/T09C ST62T10C/T20C/E20C 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)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. 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 STMicroelectronics, to gain access to the OTP contents. Returned parts with a protection set can therefore not be ac- cepted. Figure 4. Program Memory Map (*) Reserved areas should be filled with 0FFh 0000h 0AFFh 0B00h 0B9Fh NOT IMPLEMENTED RESERVED* USER PROGRAM MEMORY (OTP) 1024 BYTES 0BA0h 0F9Fh 0FA0h 0FEFh 0FF0h 0FF7h 0FF8h 0FFBh 0FFCh 0FFDh 0FFEh 0FFFh RESERVED* RESERVED INTERRUPT VECTORS NMI VECTOR USER RESET VECTOR 0000h 07Fh USER PROGRAM MEMORY (OTP/EPROM) 3872 BYTES 080h 0F9Fh 0FA0h 0FEFh 0FF0h 0FF7h 0FF8h 0FFBh 0FFCh 0FFDh 0FFEh 0FFFh RESERVED* RESERVED* INTERRUPT VECTORS NMI VECTOR USER RESET VECTOR RESERVED* 0000h 07FFh 0800h 087Fh NOT IMPLEMENTED RESERVED* USER PROGRAM MEMORY (OTP) 1824 BYTES 0880h 0F9Fh 0FA0h 0FEFh 0FF0h 0FF7h 0FF8h 0FFBh 0FFCh 0FFDh 0FFEh 0FFFh RESERVED* RESERVED INTERRUPT VECTORS NMI VECTOR USER RESET VECTOR ST62T08C,T09C ST62T10C ST62T20C,E20C 95 |
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