Freescale Semiconductor Block Guide, EETX4K Example Erase Verify Command Flow Program Command

Freescale Semiconductor, Inc.

Freescale Semiconductor, Inc.

Block Guide — S12EETX4KV0 V00.04

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

Write: EEPROM Address

1.and Dummy Data

						NOTE: command write sequence
	2.	Write: ECMD register
						aborted by writing $00 to
		Erase Verify Command $05
						ESTAT register.
						NOTE: command write sequence
		Write: ESTAT register
	3.					aborted by writing $00 to
		Clear CBEIF $80
						ESTAT register.
Bit Polling for			Read: ESTAT register
					no
			CCIF
Command Completion
			Set?
Check
			yes
Erase Verify			BLANK		no
Status			Set?
			yes
			EXIT	EEPROM Memory			EXIT	EEPROM Memory
				Erased				Not Erased

Figure 4-2 Example Erase Verify Command Flow

4.1.3.2 Program Command

The program operation will program a previously erased word in the EEPROM memory using an embedded algorithm.

An example flow to execute the program operation is shown in Figure 4-3. The program command write sequence is as follows:

1.Write to an EEPROM block address to start the command write sequence for the program command. The data written will be programmed to the address written.

30

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