st62t65cm3 STMicroelectronics, st62t65cm3 Datasheet - Page 8

• Manufacturer Part Number: st62t65cm3
• Description: 8-bit Otp/eprom Mcus With A/d Converter, Safe Reset, Auto-reload Timer, Eeprom And Spi
• Manufacturer: STMicroelectronics

ST62T55C ST62T65C/E65C
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.
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.
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Figure 4.ST62T55C/T65C/E65C Program
(*) Reserved areas should be filled with 0FFh
0FEFh
0FFBh
0FFCh
0FFDh
0FFEh
0F9Fh
0FA0h
0FF0h
0FF7h
0FF8h
0FFFh
007Fh
0000h
0080h
Memory Map
INTERRUPT VECTORS
USER RESET VECTOR
PROGRAM MEMORY
(OTP/EPROM)
NMI VECTOR
3872 BYTES
RESERVED
RESERVED
RESERVED
USER
*
*