st62t25c STMicroelectronics, st62t25c Datasheet - Page 7

• Manufacturer Part Number: st62t25c
• Description: 8-bit Otp/eprom Mcus With A/d Converter, Oscillator Safeguard, Safe Reset And 28 Pins
• Manufacturer: STMicroelectronics

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.
Figure 4. Program Memory Map
(*) Reserved areas should be filled with 0FFh
0FA0h
0FEFh
0FFBh
0FFCh
0FFDh
0FFEh
0FFFh
07FFh
0F9Fh
0FF0h
0FF7h
0FF8h
0000h
0800h
087Fh
0880h
INTERRUPT VECTORS
USER RESET VECTOR
PROGRAM MEMORY
NOT IMPLEMENTED
NMI VECTOR
RESERVED
1824 BYTES
RESERVED
RESERVED
ST62T15C
USER
(OTP)
*
*
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.
0F9Fh
0FA0h
0FEFh
0FF0h
0FF7h
0FF8h
0FFBh
0FFCh
0FFDh
0FFEh
0FFFh
0000h
07Fh
080h
INTERRUPT VECTORS
USER RESET VECTOR
PROGRAM MEMORY
ST62T25C, E25C
(OTP/EPROM)
RESERVED
NMI VECTOR
3872 BYTES
RESERVED
RESERVED
USER
ST62T15C/T25C/E25C
*
*
*
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