參數(shù)資料
型號： ST6242B
英文描述： 8-BIT MICROCONTROLLER ( MCU ) WITH OTP. ROM. FASTROM. EPROM. LCD DRIVER. EEPROM. A/D CONVERTER AND 64 PINS
中文描述： 8位微控制器（MCU）的與檢察官辦公室。光盤。 FASTROM。存儲器。液晶顯示驅(qū)動程序。 EEPROM中。的A / D轉(zhuǎn)換器和64個
文件頁數(shù)： 9/74頁
文件大?。?/td> 733K
代理商： ST6242B
9/74
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
RESERVED
*
USER
PROGRAM MEMORY
(OTP/EPROM)
3872 BYTES
0F9Fh
0FA0h
0FEFh
0FF0h
0FF7h
0FF8h
0FFBh
0FFCh
0FFDh
0FFEh
0FFFh
RESERVED
*
RESERVED
INTERRUPT VECTORS
NMI VECTOR
USER RESET VECTOR
0080h
(*) Reserved areas should be filled with 0FFh
007Fh
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