ST7LITE20F2 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
ST7LITE20F2
STMicroelectronics
'ST7LITE20F2' PDF : 170 Pages View PDF
ST7LITE20F2 ST7LITE25F2 ST7LITE29F2
3
Register & memory map
Register & memory map
Note:
As shown in Figure 4, the MCU is able of addressing 64K bytes of memories and I/O
registers.
The available memory locations consist of 128 bytes of register locations, 384 bytes of
RAM, 256 bytes of data EEPROM and 8 Kbytes of user program memory. The RAM space
includes up to 128 bytes for the stack from 180h to 1FFh.
The highest address bytes contain the user reset and interrupt vectors.
The Flash memory contains two sectors (see Figure 4) mapped in the upper part of the ST7
addressing space so the reset and interrupt vectors are located in Sector 0 (F000h-FFFFh).
The size of Flash Sector 0 and other device options are configurable by Option byte (refer to
Section 15: Device configuration).
Memory locations marked as “Reserved” must never be accessed. Accessing a reserved
area can have unpredictable effects on the device.
Figure 4. Memory map
0000h
007Fh
0080h
01FFh
20h
0FFFh
1000h
10FFh
1100h
HW
registers(1)
RAM
(384 Bytes)
Reserved
Data EEPROM
(256 Bytes)
0080h
00FFh
0100h
017Fh
0180h
01FFh
Short Addressing
RAM (zero page)
16-bit Addressing
RAM
128 Bytes Stack
1000h
RCCR0
(3)
1001h
RCCR1
DFFFh
E000h
FFDFh
FFE0h
FFFFh
Reserved
Flash memory
(8K)
Interrupt
& reset vectors(2)
8K Flash
PROGRAM MEMORY
E000h
FBFFh
FC00h
FFFFh
7 Kbytes
SECTOR 1
1 Kbyte
SECTOR 0
FFDEh
RCCR0
(3)
FFDFh
RCCR1
1. SeeTable 3: Hardware register map
2. See Table 12: Interrupt mapping
3. See Section 7.1: Internal RC oscillator adjustment
Doc ID 8349 Rev 5
17/166
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