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ST62T25C Datenblatt(PDF) 8 Page - STMicroelectronics

Teilenummer ST62T25C
Bauteilbeschribung  8-BIT OTP/EPROM MCUs WITH A/D CONVERTER, OSCILLATOR SAFEGUARD, SAFE RESET AND 28 PINS
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Hersteller  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST62T25C Datenblatt(HTML) 8 Page - STMicroelectronics

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ST62T15C/T25C/E25C
MEMORY MAP (Cont’d)
1.3.3 Data Space
Data Space accommodates all the data necessary
for processing the user program. This space com-
prises the RAM resource, the processor core and
peripheral registers, as well as read-only data
such as constants and look-up tables in OTP/
EPROM.
1.3.3.1 Data ROM
All read-only data is physically stored in program
memory, which also accommodates the Program
Space. The program memory consequently con-
tains the program code to be executed, as well as
the constants and look-up tables required by the
application.
The Data Space locations in which the different
constants and look-up tables are addressed by the
processor core may be thought of as a 64-byte
window through which it is possible to access the
read-only data stored in OTP/EPROM.
1.3.3.2 Data RAM
In ST6225 devices, the data space includes 60
bytes of RAM, the accumulator (A), the indirect
registers (X), (Y), the short direct registers (V),
(W), the I/O port registers, the peripheral data and
control registers, the interrupt option register and
the Data ROM Window register (DRW register).
1.3.4 Stack Space
Stack space consists of six 12-bit registers which
are used to stack subroutine and interrupt return
addresses, as well as the current program counter
contents.
Table 1. ST6225 Data Memory Space
RESERVED
000h
03Fh
DATA ROM WINDOW AREA
64 BYTES
040h
07Fh
X REGISTER
080h
Y REGISTER
081h
V REGISTER
082h
W REGISTER
083h
DATA RAM 60 BYTES
084h
0BFh
PORT A DATA REGISTE R
0C0h
PORT B DATA REGISTE R
0C1h
PORT C DATA REGISTER
0C2h
RESERVED
0C3h
PORT A DIRECTION REGISTER
0C4h
PORT B DIRECTION REGISTER
0C5h
PORT C DIRECTI ON REGISTER
0C6h
RESERVED
0C7h
INTERRUPT OPTI ON REGISTE R
0C8h*
DATA ROM WINDOW REGISTER
0C9h*
RESERVED
0CAh
0CBh
PORT A OPTION REGISTER
0CCh
PORT B OPTION REGISTER
0CDh
PORT C OPTION REGISTE R
0CEh
RESERVED
0CFh
A/D DATA REGISTER
0D0h
A/D CONTROL REGISTER
0D1h
TIMER PRES CALER REGISTER
0D2h
TIMER COUNTE R REGISTE R
0D3h
TIMER STATUS CONTROL REGISTER
0D4h
RESERVED
0D5h
0D6h
0D7h
WATCHDOG REGIS TER
0D8h
RESERVED
0D9h
0FEh
ACCUMULATOR
0FFh
* WRITE ONLY REGISTER
8


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