參數(shù)資料
型號: ST62P45BQ6/XXX
廠商: STMICROELECTRONICS
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP52
封裝: PLASTIC, QFP-52
文件頁數(shù): 72/72頁
文件大小: 514K
代理商: ST62P45BQ6/XXX
9/72
ST62T45B/E45B
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
memory by selecting the READOUT PROTEC-
TION option 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 SGS-THOMSON,
to gain access to the Program memory contents.
Returned parts with a protection set can therefore
not be accepted.
Figure 4. ST62E45B/T45B 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
8
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