ST7263 datasheet(10/109 Pages) STMICROELECTRONICS

10 / 109 page

ST7263

10/109

1.4 REGISTER & MEMORY MAP

As shown in Figure 5, the MCU is capable of ad-

dressing 64K bytes of memories and I/O registers.

The available memory locations consist of 192

bytes of register location, up to 512 bytes of RAM

and up to 16K bytes of user program memory. The

RAM space includes up to 64 bytes for the stack

from 0100h to 013Fh.

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

Figure 5. Memory Map

* Program memory and RAM sizes are product dependent (see Table 1 Device Summary)

Table 3. Interrupt Vector Map

* If the peripheral is present on the device (see Table 1 Device Summary)

Vector Address

Description

Masked by

Remarks

Exit from Halt Mode

FFF0-FFF1h

FFF2-FFF3h

FFF4-FFF5h

FFF6-FFF7h

FFF8-FFF9h

FFFA-FFFBh

FFFC-FFFDh

FFFE-FFFFh

USB Interrupt Vector

SCI Interrupt Vector*

I2C Interrupt Vector*

TIMER Interrupt Vector

IT1 to IT8 Interrupt Vector

USB End Suspend Mode Interrupt Vector

TRAP (software) Interrupt Vector

RESET Vector

I- bit

none

Internal Interrupt

External Interrupts

Internal Interrupt

CPU Interrupt

Yes

0000h

Interrupt & Reset Vectors

HW Registers

0040h

003Fh

(see

Table

FFEFh

FFF0h

FFFFh

(see Table 3 on page 10)

C000h

BFFFh

F000h

Program Memory*

512 Bytes RAM*

8K Bytes

4K Bytes

E000h

Short Addressing

Stack (64 Bytes)

0100h

0040h

00FFh

013Fh

Reserved

0240h

023Fh

RAM (192 Bytes)

16K Bytes

256 Bytes RAM*

Short Addressing

Stack (64 Bytes)

0100h

0140h

023Fh

0040h

00FFh

013Fh

16-bit Addressing RAM

RAM (192 Bytes)

(256 Bytes)

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