Chapter 3 4 Kbyte EEPROM Module (S12XEETX4KV2)
MC9S12XDP512 Data Sheet, Rev. 2.11
154 Freescale Semiconductor
3.3.2.7 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.

3.3.2.8 RESERVED3
This register is reserved for factory testing and is not accessible.
Module Base + 0x0006
76543210
R0 CMDB
W
Reset 00000000
= Unimplemented or Reserved

Figure 3-9. EEPROM Command Register (ECMD)

Table 3-8. ECMD Field Descriptions

Field Description
6–0
CMDB[6:0]
EEPROM Command Bits — Valid EEPROM commands are shown in Table 3-9. Writing any command other
than those listed in Table 3-9 sets the ACCERR flag in the ESTAT register.

Table 3-9. 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
Module Base + 0x0007
76543210
R00000000
W
Reset 00000000
= Unimplemented or Reserved

Figure 3-10. RESERVED3