SDIP56 Просмотр технического описания (PDF) - STMicroelectronics

Номер в каталоге

Компоненты Описание

производитель

SDIP56

8-BIT OTP/EPROM MCU WITH LCD DRIVER, EEPROM AND A/D CONVERTER

STMicroelectronics 

ST62T46B/E46B

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 Program memory contents.

Returned parts with a protection set can therefore

not be accepted.

Figure 4. ST62E46B/T46B Program

Memory Map

0000h

007Fh

0080h

RESERVED*

USER

PROGRAM MEMORY

(OTP/EPR OM)

3872 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

9/72

345

Share Link: