ST7LITE20F2 datasheet(24/166 Pages) STMICROELECTRONICS

部件名	ST7LITE20F2

功能描述	8-bit microcontroller with single voltage Flash memory, data EEPROM, ADC, Timers, SPI

PDF	166 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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24 / 166 page

Data EEPROM

ST7LITE20F2 ST7LITE25F2 ST7LITE29F2

24/166

Doc ID 8349 Rev 5

Data EEPROM

5.1

Introduction

The Electrically Erasable Programmable Read Only Memory can be used as a non-volatile

backup for storing data. Using the EEPROM requires a basic access protocol described in

this chapter.

5.2

Main features

●

Up to 32 bytes programmed in the same cycle

●

EEPROM mono-voltage (charge pump)

●

Chained erase and programming cycles

●

Internal control of the global programming cycle duration

●

WAIT mode management

●

Read-out protection

Figure 6.

EEPROM block diagram

5.3

Memory access

The Data EEPROM memory read/write access modes are controlled by the E2LAT bit of the

EEPROM Control/Status register (EECSR). The flowchart in Figure 7 describes these

different memory access modes.

EECSR

High voltage

pump

E2LAT

E2PGM

EEPROM

memory matrix

(1 ROW = 32 x 8 BITS)

Address

decoder

Data

multiplexer

32 x 8 bits

data latches

Row

decoder

DATA BUS

128

Address bus

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