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ST6215C Datasheet(PDF) 9 Page - STMicroelectronics

Part No. ST6215C
Description  8-BIT MCUs WITH A/D CONVERTER, TWO TIMERS, OSCILLATOR SAFEGUARD & SAFE RESET
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST6215C Datasheet(HTML) 9 Page - STMicroelectronics

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3 MEMORY MAPS, PROGRAMMING MODES AND OPTION BYTES
3.1 MEMORY AND REGISTER MAPS
3.1.1 Introduction
The MCU operates in three separate memory
spaces: Program space, Data space, and Stack
space. Operation in these three memory spaces is
described in the following paragraphs.
Briefly, Program space contains user program
code in OTP and user vectors; Data space con-
tains user data in RAM and in OTP, and Stack
space accommodates six levels of stack for sub-
routine and interrupt service routine nesting.
Figure 3. Memory Addressing Diagram
PROGRAM SPACE
PROGRAM
INTERRUPT &
RESET VECTORS
ACCUMULATOR
RAM
X REGISTER
Y REGISTER
V REGISTER
W REGISTER
000h
03Fh
040h
07Fh
080h
081h
082h
083h
084h
0C0h
0FFh
DATA SPACE
000h
0FF0h
0FFFh
MEMORY
MEMORY WINDOW
DATA READ-ONLY
RESERVED
HARDWARE
CONTROL
REGISTERS
0BFh
(see Table 2)
(see Figure 4
on page 10)
1


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