Freescale Semiconductor Block Guide Estat Eeprom Status Register, Eeprom Protection Address Range

Freescale Semiconductor, Inc.

Freescale Semiconductor, Inc.

Block Guide — S12EETX4KV0 V00.04

Table 3-3 EEPROM Protection Address Range

EPS[2:0]	Address Offset	Protected Size
	Range
000	$_FC0-$_FFF	64 bytes
001	$_F80-$_FFF	128 bytes
010	$_F40-$_FFF	192 bytes
011	$_F00-$_FFF	256 bytes
100	$_EC0-$_FFF	320 bytes
101	$_E80-$_FFF	384 bytes
110	$_E40-$_FFF	448 bytes
111	$_E00-$_FFF	512 bytes

3.3.6 ESTAT — EEPROM Status Register

The ESTAT register defines the operational status of the module.

Address Offset: $_05

	7	6	5	4	3	2	1	0
R	CBEIF	CCIF	PVIOL	ACCERR	0	BLANK	0	0
W
Reset:	1	1	0	0	0	0	0	0

= Unimplemented or Reserved

Figure 3-7 EEPROM Status Register (ESTAT)

CBEIF, PVIOL and ACCERR are readable and writable, CCIF and BLANK are readable and not writable, remaining bits read zero and are not writable.

CBEIF — Command Buffer Empty Interrupt Flag.

The CBEIF flag indicates that the address, data and command buffers are empty so that a new command write sequence can be started. The CBEIF flag is cleared by writing a “1” to CBEIF. Writing a “0” to the CBEIF flag has no effect on CBEIF. Writing a “0” to CBEIF after writing an aligned word to the EEPROM address space but before CBEIF is cleared will abort a command write sequence and cause the ACCERR flag to be set. Writing a “0” to CBEIF outside of a command write sequence will not set the ACCERR flag. The CBEIF flag is used together with the CBEIE bit in the ECNFG register to generate an interrupt request (see Figure 4-8).

1 = Buffers are ready to accept a new command.

0 = Buffers are full.

CCIF — Command Complete Interrupt Flag.

20

For More Information On This Product,

Go to: www.freescale.com