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ST7LITEU09 Datasheet(PDF) 8 Page - STMicroelectronics

No. de pieza ST7LITEU09
Descripción Electrónicos  8-bit MCU with single voltage Flash memory, ADC, timers
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST7LITEU09 Datasheet(HTML) 8 Page - STMicroelectronics

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3 REGISTER & MEMORY MAP
As shown in Figure 5, the MCU is capable of ad-
dressing 64K bytes of memories and I/O registers.
The available memory locations consist of 128
bytes of register locations, 128 bytes of RAM and
1 Kbytes of user program memory. The RAM
space includes up to 64 bytes for the stack from
00C0h to 00FFh.
The highest address bytes contain the user reset
and interrupt vectors.
The Flash memory contains two sectors (see Fig-
ure 5) mapped in the upper part of the ST7 ad-
dressing space so the reset and interrupt vectors
are located in Sector 0 (FC00-FFFFh).
The size of Flash Sector 0 and other device op-
tions are configurable by Option byte.
IMPORTANT: Memory locations marked as “Re-
served” must never be accessed. Accessing a re-
seved area can have unpredictable effects on the
device.
Figure 5. Memory Map
Note:
1. DEE0h, DEE1h, DEE2h and DEE3h addresses are located in a reserved area but are special bytes
containing also the RC calibration values which are read-accessible only in user mode. If all the EEPROM
data or Flash space (including the RC calibration values locations) has been erased (after the read-out
protection removal), then the RC calibration values can still be obtained through these addresses.
0000h
RAM
Flash Memory
(2K)
Interrupt & Reset Vectors
HW Registers
0080h
007Fh
(see Table 3)
FFE0h
FFFFh
(see
Table
0100h
00FFh
Short Addressing
RAM (zero page)
64-Byte Stack
00FFh
0080h
00C0h
(128 Bytes)
F800h
F7FFh
Reserved
FFDFh
1 Kbyte
1 Kbyte
SECTOR 1
SECTOR 0
2K FLASH
FFFFh
FC00h
FBFFh
F800h
PROGRAM MEMORY
DEE0h
RCCRH0
RCCRL0
DEE1h
see section 7.1 on page 22
RCCRH1
RCCRL1
DEE2h
DEE3h
DATA
EEPROM
1080h
107Fh
1000h
0FFFh
Reserved
(128 Bytes)
1


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