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ST72321BXXX-AUTO Datasheet(PDF) 32 Page - STMicroelectronics

Part # ST72321BXXX-AUTO
Description  8-bit MCU for automotive with 32 to 60 Kbyte Flash/ROM, ADC, 5 timers, SPI, SCI, I2C interface
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST72321BXXX-AUTO Datasheet(HTML) 32 Page - STMicroelectronics

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Register and memory map
ST72321Bxxx-Auto
32/247
3
Register and memory map
As shown in Figure 4, the MCU is capable of addressing 64 Kbytes of memories and I/O
registers.
The available memory locations consist of 128 bytes of register locations, up to 2 Kbytes of
RAM and up to 60 Kbytes of user program memory. The RAM space includes up to 256
bytes for the stack from 0100h to 01FFh.
The highest address bytes contain the user reset and interrupt vectors.
Caution:
Memory locations marked as “Reserved” must never be accessed. Accessing a reserved
area can have unpredictable effects on the device.
Related documentation
Executing Code in ST7 RAM (AN 985)
Figure 4.
Memory map
0000h
RAM
Program Memory
(60, 48 or 32 Kbytes)
Interrupt and Reset Vectors
HW Registers
0080h
007Fh
0FFFh
(see Table 3)
1000h
FFDFh
FFE0h
FFFFh
(see Table 19)
0880h
Reserved
087Fh
Short Addressing
RAM (zero page)
256 bytes Stack
16-bit Addressing
RAM
0100h
01FFh
0080h
0200h
00FFh
or 087Fh
32 Kbytes
8000h
60 Kbytes
48 Kbytes
FFFFh
1000h
4000h
(2048, 1536 or 1024 bytes)
or 067Fh
or 047Fh


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