ST7263BE1 Просмотр технического описания (PDF) - STMicroelectronics
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ST7263BE1 Datasheet PDF : 186 Pages
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ST7263Bxx
3
Register and memory map
Register and memory map
Caution:
As shown in Figure 7, the MCU is capable of addressing 32 Kbytes of memories and I/O
registers.
The available memory locations consist of up to 1024 bytes of RAM including 64 bytes of
register locations, and up to 32K bytes of user program memory in which the upper 32 bytes
are reserved for interrupt vectors. The RAM space includes up to 128 bytes for the stack
from 0100h to 017Fh.
The highest address bytes contain the user reset and interrupt vectors.
Memory locations noted “Reserved” must never be accessed. Accessing a reserved area
can have unpredictable effects on the device.
Figure 7. Memory map
0000h
003Fh
0040h
HW registers
(See Table 5)
RAM
(384 / 512 / 1024 Bytes)
01BF / 023F / 043Fh
01C0 / 0240 / 0440h
Reserved
7FFFh
8000h
FFDFh
FFE0h
FFFFh
Program memory
(4 / 8 / 16 / 32 KBytes)
Interrupt & Reset Vectors
(See Table 4)
0040h
00FFh
0100h
017Fh
0180h
01BF / 023F / 043Fh
Short Addressing
RAM (192 bytes)
Stack
(128 Bytes)
16-bit Addressing
RAM
8000h
32 KBytes
C000h
E000h
F000h
FFDFh
16 KBytes
8 KBytes
4 KBytes
Table 5. Interrupt vector map
Vector address
Description
FFE0h-FFEDh
FFEEh-FFEFh
FFF0h-FFF1h
FFF2h-FFF3h
FFF4h-FFF5h
FFF6h-FFF7h
FFF8h-FFF9h
FFFAh-FFFBh
FFFCh-FFFDh
FFFEh-FFFFh
Reserved area
USB interrupt vector
SCI interrupt vector
I²C interrupt vector
TIMER interrupt vector
IT1 to IT8 interrupt vector
USB End Suspend mode interrupt vector
Flash start programming interrupt vector
TRAP (software) interrupt vector
RESET vector
Masked
I- bit
I- bit
I- bit
I- bit
I- bit
I- bit
I- bit
None
None
Remarks
Internal interrupt
Internal interrupt
Internal interrupt
Internal interrupt
External interrupt
External interrupts
Internal interrupt
CPU interrupt
Exit from Halt
No
No
No
No
Yes
Yes
Yes
No
Yes
Doc ID 7516 Rev 8
21/186
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