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ST6209CM6/XXX

8-BIT OTP/EPROM MCUs WITH A/D CONVERTER, OSCILLATOR SAFEGUARD, SAFE RESET AND 20 PINS

STMicroelectronics 

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.

Figure 4. Program Memory Map

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.

0000h

ST62T08C,T09C

0000h

ST62T10C

NOT IMPLEMENTED

0000h

07Fh

080h

ST62T20C,E20C

RESERVED*

NOT IMPLEMENTED

0AFFh

0B00h

0B9Fh

0BA0h

RESERVED*

0F9Fh

0FA0h

0FEFh

0FF0h

0FF7h

0FF8h

0FFBh

0FFCh

0FFDh

0FFEh

0FFFh

USER

PROGRAM MEMORY

(OTP)

1024 BYTES

RESERVED*

INTERRUPT VECTORS

RESERVED

NMI VECTOR

USER RESET VECTOR

07FFh

0800h

087Fh

0880h

RESERVED*

USER

PROGRAM MEMORY

(OTP)

1824 BYTES

0F9Fh

0FA0h

0FEFh

0FF0h

0FF7h

0FF8h

0FFBh

0FFCh

0FFDh

0FFEh

0FFFh

RESERVED*

INTERRUPT VECTORS

RESERVED

NMI VECTOR

USER RESET VECTOR

(*) Reserved areas should be filled with 0FFh

USER

PROGRAM MEMORY

(OTP/EPROM)

3872 BYTES

0F9Fh

0FA0h

0FEFh

0FF0h

0FF7h

0FF8h

0FFBh

0FFCh

0FFDh

0FFEh

0FFFh

RESERVED*

INTERRUPT VECTORS

RESERVED*

NMI VECTOR

USER RESET VECTOR

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