ST72C314N4 Просмотр технического описания (PDF) - STMicroelectronics

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ST72C314N4

8-bit MCU for automotive with single voltage Flash/ROM memory, ADC, 16-bit timers, SPI, SCI interfaces

STMicroelectronics 

ST72334xx-Auto, ST72314xx-Auto, ST72124Jx-Auto

DATA EEPROM (Cont’d)

6.4 POWER SAVING MODES

Wait mode

The Data EEPROM can enter Wait mode on exe-

cution of the WFI instruction of the microcontroller.

The Data EEPROM will immediately enter this

mode if there is no programming in progress, oth-

erwise the Data EEPROM will finish the cycle and

then enter Wait mode.

Halt mode

The Data EEPROM immediately enters Halt mode

if the microcontroller executes the HALT instruc-

tion. Therefore the EEPROM will stop the function

in progress, and data may be corrupted.

6.5 ACCESS ERROR HANDLING

If a read access occurs while LAT=1, then the data

bus will not be driven.

If a write access occurs while LAT=0, then the

data on the bus will not be latched.

If a programming cycle is interrupted (by software/

RESET action), the memory data will not be guar-

anteed.

Figure 8. Data EEPROM Programming Cycle

INTERNAL

PROGRAMMING

VOLTAGE

WRITE OF

DATA LATCHES

READ OPERATION NOT POSSIBLE

ERASE CYCLE

WRITE CYCLE

tPROG

READ OPERATION POSSIBLE

LAT

PGM

EEPROM INTERRUPT

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