Freescale Semiconductor, Inc.

Freescale Semiconductor, Inc.

Block Guide — S12EETX4KV0 V00.04

2.Write the sector modify command, $60, to the ECMD register.

3.Clear the CBEIF flag in the ESTAT register by writing a “1” to CBEIF to launch the sector erase command.

If an EEPROM sector to be modified is in a protected area of the EEPROM memory, the PVIOL flag in the ESTAT register will set and the sector modify command will not launch. Once the sector modify command has successfully launched, the CCIF flag in the ESTAT register will set after the sector modify operation has completed unless a new command write sequence has been buffered.

START

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Read: ECLKDIV register

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Clock Register

 

 

 

 

 

 

 

 

 

 

 

NOTE: ECLKDIV needs to

EDIVLD

 

 

no

 

 

 

 

Written

 

 

 

 

 

 

Set?

 

 

 

 

 

 

 

 

be set once after each reset.

Check

yes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Write: ECLKDIV register

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Read: ESTAT register

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Address, Data,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CBEIF

no

 

 

 

Command

 

 

 

 

 

 

 

 

 

Set?

 

 

 

 

 

 

 

Buffer Empty Check

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

yes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Access Error and

 

 

 

ACCERR/

yes

 

 

 

 

 

 

Write: ESTAT register

Protection Violation

 

 

 

PVIOL

 

 

 

 

Clear ACCERR/PVIOL $30

 

 

 

 

 

 

 

 

 

 

Set?

 

 

 

 

Check

 

 

 

 

 

 

 

 

 

 

 

 

 

no

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.

Write: EEPROM Word Address

 

 

 

 

and program Data

 

 

 

 

 

NOTE: command write sequence

 

 

 

 

 

 

 

 

 

 

2.

Write: ECMD register

 

 

aborted by writing $00 to

Sector Modify Command $60

 

 

 

ESTAT register.

 

 

 

 

 

 

 

 

 

 

NOTE: command write sequence

 

Write: ESTAT register

 

3.

 

aborted by writing $00 to

Clear CBEIF $80

 

 

 

ESTAT register.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Read: ESTAT register

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Bit Polling for

Command Completion CCIFno

Set?

Check

yes

EXIT

Figure 4-7 Example Sector Modify Command Flow

4.1.4 Illegal EEPROM Operations

The ACCERR flag will be set during the command write sequence if any of the following illegal steps are performed, causing the command write sequence to immediately abort:

38

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Freescale Semiconductor Block Guide, EETX4K warranty Illegal Eeprom Operations, Example Sector Modify Command Flow
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Block Guide, EETX4K specifications

Freescale Semiconductor, a global leader in embedded processing solutions, introduced the EETX4K, a revolutionary embedded processor designed to meet the growing demands of industrial applications. The EETX4K processor is specifically engineered for high-performance, low-power systems, offering an ideal balance between performance and power consumption.

One of the main features of the EETX4K is its high level of integration. This processor houses a powerful ARM Cortex-A9 core, which allows for efficient processing capabilities while maintaining a compact architecture. This ensures that the EETX4K can operate seamlessly in various applications, including automotive systems, industrial automation, and consumer electronics.

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