ST72F321R9TA データシートの表示（PDF） - STMicroelectronics

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ST72F321R9TA

8-BIT MCU WITH NESTED INTERRUPTS, FLASH, 10-BIT ADC, FIVE TIMERS, SPI, SCI, I2C INTERFACE

STMicroelectronics 

ST72321

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.

Figure 4. Memory Map

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.

0000h

007Fh

0080h

HW Registers

(see Table 2)

RAM

(2048, 1536 or 1024 Bytes)

087Fh

0880h

0FFFh

1000h

FFDFh

FFE0h

FFFFh

Reserved

Program Memory

(60K, 48K or 32K)

Interrupt & Reset Vectors

(see Table 7)

0080h

00FFh

0100h

01FFh

0200h

or 047Fh

or 067Fh

or 087Fh

Short Addressing

RAM (zero page)

256 Bytes Stack

16-bit Addressing

RAM

1000h

4000h

8000h

60 KBytes

48 KBytes

32 KBytes

FFFFh

13/185

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