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RL78 Family

Chapter 3

EEL Functional Specifications

EEPROM Emulation Library Pack02

R01US0068EJ0100

Rev.1.00

Page 19 of 53

Mar. 28, 2014

3.2

State Transitions

To use EEPROM emulation from a user-created program, it is necessary to initialize the EEL and execute

functions that perform operations such as reading and writing on EEL blocks. Figure 3-1 shows the overall state

transitions, and Figure 3-2 shows an operation flow for using basic features. When using EEPROM emulation,

incorporate EEPROM emulation into user-created programs by following this flow.

Figure 3-1

State transitions diagram

FDL_Init()

↓

FDL_Open()

　　 ↓

EEL_Init()

closed

FDL_Close()

EEL_Open()

EEL_Close()

opened

Format executing

busy

Startup executing

busy

EEL_CMD_FORMAT

EEL_CMD_STARTUP

status:OK

status:ERROR

started

status:OK

ERROR Verify

EEL_CMD_FORMAT

EEPROM command executing

busy

EEL_CMD_WRITE

EEL_CMD_READ

EEL_CMD_REFRESH

EEL_CMD_VERIFY

status:OK

status:ERROR

EEL_CMD_SHUTDOWN

status:ERROR

EEL_CMD_STARTUP

Reset or Power ON

uninitialized

exhausted

EEPROM command executing

busy

EEL_CMD_READ

EEL_CMD_VERIFY

status:OK

status:ERROR

status:

ERROR

POOL_EXHAUSTED

status:

ERROR

POOL_EXHAUSTED

EEL_CMD_SHUTDOWN

Note 1:

EEL_Close and EEL_Init can be called from every state. Please note however, that this interrupts any

EEL processing and can lead to unpredictable behavior.

Note 2:

Once the EEL_CMD_FORMAT command is started, be sure to finish it.

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