ST72521 STMICROELECTRONICS [STMicroelectronics], ST72521 Datasheet - Page 14

• Manufacturer Part Number: ST72521
• Description: 8-BIT MCU WITH NESTED INTERRUPTS, FLASH, 10-BIT ADC, FIVE TIMERS, SPI, SCI, I2C, CAN INTERFACE
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

ST72521
3 REGISTER & MEMORY MAP
As shown in
dressing 64K bytes of memories and I/O registers.
The available memory locations consist of 128
bytes of register locations, up to 2Kbytes of RAM
and up to 60Kbytes of user program memory. The
RAM space includes up to 256 bytes for the stack
from 0100h to 01FFh.
Figure 4. Memory Map
14/211
FFFFh
FFDFh
FFE0h
0FFFh
0000h
007Fh
0080h
0880h
087Fh
1000h
Interrupt & Reset Vectors
(2048 or 1024 Bytes)
Figure
Program Memory
HW Registers
(see
(60K or 32K)
(see
Reserved
RAM
Table
Table
4, the MCU is capable of ad-
2)
7)
or 047Fh
or 067Fh
or 087Fh
00FFh
01FFh
0080h
0100h
0200h
Short Addressing
16-bit Addressing
RAM (zero page)
256 Bytes Stack
The highest address bytes contain the user reset
and interrupt vectors.
IMPORTANT: Memory locations marked as “Re-
served” must never be accessed. Accessing a re-
seved area can have unpredictable effects on the
device.
RAM
1000h
8000h
FFFFh
60 KBytes
32 KBytes