ST7260K1 데이터 시트보기 (PDF) - STMicroelectronics

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ST7260K1

LOW SPEED USB 8-BIT MCU FAMILYWITH UP TO 8K FLASH/ROM AND SERIAL COMMUNICATION INTERFACE (SCI)

STMicroelectronics 

ST7260

3 REGISTER & MEMORY MAP

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

dressing 8 Kbytes of memories and I/O registers.

The available memory locations consist of up to

384 bytes of RAM including 64 bytes of register lo-

cations, and up to 8K bytes of user program mem-

ory in which the upper 32 bytes are reserved for in-

terrupt vectors. The RAM space includes up to 128

bytes for the stack from 0100h to 017Fh.

Figure 4. Memory Map

0000h

003Fh

0040h

HW Registers

(See Table 5)

RAM

(384 Bytes)

01BFh

01C0h

Reserved

7FFFh

8000h

FFDFh

FFE0h

FFFFh

Program Memory

(4 / 8 KBytes)

Interrupt & Reset Vectors

(See Table 4)

The highest address bytes contain the user reset

and interrupt vectors.

IMPORTANT: Memory locations noted “Re-

served” must never be accessed. Accessing a re-

served area can have unpredictable effects on the

device.

0040h

00FFh

0100h

017Fh

0180h

01BFh

Short Addressing

RAM (192 bytes)

Stack

(128 Bytes)

16-bit Addressing

RAM

E000h

F000h

FFDFh

8 KBytes

4 KBytes

Table 4. Interrupt Vector Map

Vector Address

Description

Masked by

FFE0h-FFEDh

FFEEh-FFEFh

FFF0h-FFF1h

FFF2h-FFF3h

FFF4h-FFF5h

FFF6h-FFF7h

FFF8h-FFF9h

FFFAh-FFFBh

FFFCh-FFFDh

FFFEh-FFFFh

Reserved Area

USB Interrupt Vector

SCI Interrupt Vector

Reserved Area

TIMER Interrupt Vector

IT1 to IT8 Interrupt Vector

USB End Suspend Mode Interrupt Vector

Flash Start Programming Interrupt Vector

TRAP (software) Interrupt Vector

RESET Vector

I- bit

I- bit

I- bit

I- bit

I- bit

I- bit

None

None

Remarks

Exit from Halt Mode

Internal Interrupt

No

Internal Interrupt

No

Internal Interrupt

No

External Interrupt

Yes

External Interrupts

Yes

Internal Interrupt

Yes

CPU Interrupt

No

Yes

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