ST6252C STMicroelectronics, ST6252C Datasheet - Page 6

• Manufacturer Part Number: ST6252C
• Description: 8 Bit ST6 Microcontroller with 4x8-bitADC 1x8-bit TIMER, 1x8-bitAR TIMER
• Manufacturer: STMicroelectronics

Specifications of ST6252C

• Data Ram: 128 bytes
• Data Eeprom: 64 bytes (none on ST62T52C)

ST6252C ST6262B ST6262C
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. ST62T52C/T62C Program
(*) Reserved areas should be filled with 0FFh
0FFCh
0FFDh
0FA0h
0FEFh
0FFBh
0FFEh
0FFFh
0F9Fh
0FF0h
0FF7h
0FF8h
0000h
087Fh
0880h
Memory Map
INTERRUPT VECTORS
USER RESET VECTOR
PROGRAM MEMORY
(OTP/EPROM)
NMI VECTOR
RESERVED
1836 BYTES
RESERVED
RESERVED
USER
*
*