ST7PLITE20F2B6 datasheet(9/133 Pages) STMICROELECTRONICS

No de pièce	ST7PLITE20F2B6

Description	8-BIT MICROCONTROLLER WITH SINGLE VOLTAGE FLASH MEMORY, DATA EEPROM, ADC, TIMERS, SPI

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ST7LITE2

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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, 384 bytes of RAM, 256

bytes of data EEPROM and 8 Kbytes of user pro-

gram memory. The RAM space includes up to 128

bytes for the stack from 180h to 1FFh.

The highest address bytes contain the user reset

and interrupt vectors.

The Flash memory contains two sectors (see Fig-

ure 4) mapped in the upper part of the ST7 ad-

dressing space so the reset and interrupt vectors

are located in Sector 0 (F000h-FFFFh).

The size of Flash Sector 0 and other device op-

tions are configurable by Option byte (refer to sec-

tion 15.1 on page 122).

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

Flash Memory

(8K)

Interrupt & Reset Vectors

HW Registers

0080h

007Fh

0FFFh

(see Table 2)

1000h

10FFh

FFE0h

FFFFh

(see Table 5)

0200h

Reserved

01FFh

Short Addressing

RAM (zero page)

128 Bytes Stack

0180h

01FFh

0080h

00FFh

(384 Bytes)

Data EEPROM

(256 Bytes)

E000h

1100h

DFFFh

Reserved

FFDFh

16-bit Addressing

RAM

0100h

017Fh

1 Kbyte

7 Kbytes

SECTOR 1

SECTOR 0

8K FLASH

FFFFh

FC00h

FBFFh

E000h

PROGRAM MEMORY

1000h

1001h

RCCR0

RCCR1

see section 7.1 on page 23

FFDEh

FFDFh

RCCR0

RCCR1

see section 7.1 on page 23

1

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