ST72C254G2 datasheet(10/135 Pages) STMICROELECTRONICS

部件名	ST72C254G2

功能描述	8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, I2C INTERFACES

PDF	135 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

10 / 135 page

ST72104G, ST72215G, ST72216G, ST72254G

10/135

3 REGISTER & MEMORY MAP

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

addressing 64K bytes of memories and I/O regis-

ters.

The available memory locations consist of 128

bytes of register location, 256 bytes of RAM and

up to 8Kbytes of user program memory. The RAM

space includes up to 128 bytes for the stack from

0100h to 017Fh.

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 unpredicable effects on the

device.

Figure 4. Memory Map

0000h

Program Memory

(4K, 8 KBytes)

Interrupt & Reset Vectors

HW Registers

DFFFh

0080h

007Fh

(see Table 2)

E000h

FFD Fh

FFE 0h

FFF Fh

(see Table 5 on page 26)

0180h

Reserved

017Fh

Short Addressing RAM

0100h

017Fh

0080h

00FFh

256 Bytes RAM

4 KBytes

F000h

E000h

8 KBytes

FFFF h

Zero page

(128 Bytes)

Stack or

16-bit Addressing RAM

(128 Bytes)

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