st62t60b STMicroelectronics, st62t60b Datasheet - Page 8

• Manufacturer Part Number: st62t60b
• Description: 8-bit Otp/eprom Mcus With A/d Converter, Auto-reload Timer, Eeprom And Spi
• Manufacturer: STMicroelectronics

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
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(*) Reserved areas should be filled with 0FFh
0FEFh
0FFBh
0FFCh
0FFDh
0FFEh
0F9Fh
0FA0h
0FF0h
0FF7h
0FF8h
0FFFh
007Fh
0080h
0000h
Memory Map
INTERRUPT VECTORS
USER RESET VECTOR
PROGRAM MEMORY
(OTP/EPROM)
NMI VECTOR
3872 BYTES
RESERVED
RESERVED
RESERVED
USER
*
*
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
(*) Reserved areas should be filled with 0FFh
0FEFh
0FFBh
0FFCh
0FFDh
0FFEh
087Fh
0F9Fh
0FA0h
0FF0h
0FF7h
0FF8h
0FFFh
0000h
0880h
Memory Map
INTERRUPT VECTORS
USER RESET VECTOR
PROGRAM MEMORY
NMI VECTOR
1824 BYTES
RESERVED
RESERVED
RESERVED
USER
(OTP)
*
*