ST72321M6 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST72321M6

80-pin 8-bit MCU with 32 to 60 Kbytes Flash, ADC, five timers, SPI, SCI, I2C interface

STMicroelectronics 

ST72321M6 ST72321M9

3 REGISTER & MEMORY MAP

As shown in Figure 3, the MCU is capable of ad-

dressing 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.

Figure 3. Memory Map

IMPORTANT: Memory locations marked as “Re-

served” must never be accessed. Accessing a re-

seved area can have unpredictable effects on the

device.

Related Documentation

AN 985: Executing Code in ST7 RAM

0000h

007Fh

0080h

HW Registers

(see Table 3)

RAM

(2048 or 1024 Bytes)

087Fh

0880h

0FFFh

1000h

FFDFh

FFE0h

Reserved

Program Memory

(60 Kbytes or 32 Kbytes)

Interrupt & Reset Vectors

FFFFh

0080h

00FFh

0100h

01FFh

0200h

or 047Fh

or 067Fh

or 087Fh

Short Addressing

RAM (zero page)

256 Bytes Stack

16-bit Addressing

RAM

1000h

60 Kbytes

8000h

32 Kbytes

FFFFh

13/175

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