ST72321_04 datasheet(13/189 Pages) STMICROELECTRONICS

Part #	ST72321

Description	64/44-PIN 8-BIT MCU WITH 32 TO 60K FLASH/ROM, ADC,FIVE TIMERS, SPI, SCI, I2C INTERFACE

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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ST72321

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3 REGISTER & MEMORY MAP

As shown in Figure 4, the MCU is capable of ad-

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.

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.

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