ST72321 datasheet(13/185 Pages) STMICROELECTRONICS

部件名	ST72321

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

PDF	185 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

13 / 185 page

ST72321

13/185

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.

Figure 4. Memory Map

0000h

RAM

Program Memory

(60K, 48K or 32K)

Interrupt & Reset Vectors

HW Registers

0080h

007Fh

0FFFh

(see Table 2)

1000h

FFDFh

FFE0h

FFFFh

(see Table 7)

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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