ST72334J2TASLASHXXX datasheet(21/150 Pages) STMICROELECTRONICS

部件名	ST72334J2TA/XXX

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

PDF	150 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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21 / 150 page

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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

LAT

ERASE CYCLE

WRITE CYCLE

PGM

tPROG

READ OPERATION NOT POSSIBLE

WRITE OF

DATA LATCHES

READ OPERATION POSSIBLE

INTERNAL

PROGRAMMING

VOLTAGE

EEPROM INTERRUPT

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