ST7FOXU0 datasheet(13/123 Pages) STMICROELECTRONICS

13 / 123 page

ST7FOXU0

13/123

As shown in Figure 3, the MCU is capable of addressing 64 Kbytes of memories and I/O

registers.

The available memory locations consist of 128 bytes of register locations, 128 bytes of RAM

and 2 Kbytes of Flash program memory. The RAM space includes up to 64 bytes for the

stack from C0h to FFh.

The highest address bytes contain the user reset and interrupt vectors.

The Flash memory contains two sectors (see Figure 3) mapped in the upper part of the ST7

addressing space so the reset and interrupt vectors are located in Sector 0 (FFE0h-FFFFh).

The size of Flash Sector 0 and other device options are configurable by option bytes (refer

to Section 13.1 on page 110).

Caution:

Memory locations marked as “Reserved” must never be accessed. Accessing a reserved

area can have unpredictable effects on the device.

Figure 3.

ST7FOXU0 memory map

0000h

RAM

Flash Memory

(2K)

Interrupt & Reset Vectors

HW Registers

0080h

007Fh

(see Table 3)

FFE0h

FFFFh

(see Table )

0100h

00FFh

Short Addressing

RAM (zero page)

64-Byte Stack

00FFh

0080h

00C0h

(128 Bytes)

F800h

F7FFh

FFDFh

1 Kbyte

SECTOR 1

SECTOR 0

2K FLASH

FFFFh

FC00h

FBFFh

F800h

PROGRAM MEMORY

DEE0h

RCCRH0

RCCRL0

DEE1h

see

Section 6.1.1

Reserved

1000h

1001h

RCCRH_USER

RCCRL_USER

Table 3.

ST7FOXU0 Hardware register map(1)

Address

Block

Reset status

Remarks

0000h

0001h

0002h

Port A

PADR

PADDR

PAOR

Port A Data Register

Port A Data Direction Register

Port A Option Register

00h (2)

08h

02h (3)

R/W

0003h to

000Ah

Reserved area (8 bytes)

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