PC912XDP512F0MPVR datasheet(1082/1348 Pages) FREESCALE

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Chapter 26 4 Kbyte EEPROM Module (S12XEETX4KV2)

MC9S12XDP512 Data Sheet, Rev. 2.21

1084

Freescale Semiconductor

26.3.2.7

EEPROM Command Register (ECMD)

The ECMD register is the EEPROM command register.

All CMDB bits are readable and writable during a command write sequence while bit 7 reads 0 and is not

writable.

26.3.2.8

RESERVED3

This register is reserved for factory testing and is not accessible.

All bits read 0 and are not writable.

EEPROM Address Registers (EADDR)

76543210

CMDB

Reset

00000000

= Unimplemented or Reserved

Figure 26-11. EEPROM Command Register (ECMD)

Table 26-8. ECMD Field Descriptions

Field

Description

6–0

CMDB[6:0]

EEPROM Command Bits — Valid EEPROM commands are shown in Table 26-9. Writing any command other

than those listed in Table 26-9 sets the ACCERR ﬂag in the ESTAT register.

Table 26-9. Valid EEPROM Command List

CMDB[6:0]

Command

0x05

Erase Verify

0x20

Word Program

0x40

Sector Erase

0x41

Mass Erase

0x47

Sector Erase Abort

0x60

Sector Modify

76543210

00000000

Reset

00000000

= Unimplemented or Reserved

Figure 26-12. RESERVED3

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