L9803 STMicroelectronics, L9803 Datasheet - Page 102

• Manufacturer Part Number: L9803
• Description: Super Smart Power Motor Driver With 8-bit Mcu, Ram, Eeprom, Adc, Wdg, Timers, Pwm And H-bridge Driver
• Manufacturer: STMicroelectronics

On-Chip Peripherals
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At the end of the programming cycle, the E2PGM and E2LAT bits are cleared
simultaneously, and an interrupt is generated if the IE bit is set. The Data EEPROM interrupt
request is cleared by hardware when the Data EEPROM interrupt vector is fetched.
Wait mode
The EEPROM can enter the wait mode by executing the wait instruction of the micro-
controller. The EEPROM will effectively enter this mode if there is no programming in
progress, in such a case the EEPROM will finish the cycle and then enter this low
consumption mode.
Halt mode
The EEPROM enters the halt mode if the micro-controller did execute the halt instruction.
The EEPROM will stop the function in progress, and will enter in this low consumption mode.
Figure 48. Data EEPROM Programming Cycle
Figure 49. EEPROM Programming Flowchart
INTERNAL
PROGRAMMING
VOLTAGE
DATA LATCHES
WRITE OF
(with the same 12
Write 1 to 4 bytes
in the same row
Most Significant
Bits of the ad-
ERASE CYCLE
READ OPERATION NOT POSSIBLE
t
PROG
Wait for end of
Write bytes in
programming
programming
(Read mode)
or interrupt)
E2PGM=0
E2PGM=1
EEPROM
E2LAT=1
(E2LAT=0
E2LAT=1
E2PGM=0
E2LAT=0
cycle)
(Start
WRITE CYCLE
READ OPERATION POSSIBLE
EEPROM INTERRUPT
E2PGM
L9803
E2LAT