Datasheet

Chapter 25 2 Kbyte EEPROM Module (S12XEETX2KV1)
MC9S12XDP512 Data Sheet, Rev. 2.21
Freescale Semiconductor 1049
25.3.2.7 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.
25.3.2.8 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
R0
CMDB
W
Reset 00000000
= Unimplemented or Reserved
Figure 25-11. EEPROM Command Register (ECMD)
Table 25-7. ECMD Field Descriptions
Field Description
6:0
CMDB[6:0]
EEPROM Command Bits — Valid EEPROM commands are shown in Table 25-8. Writing any command other
than those listed in Table 25-8 sets the ACCERR flag in the ESTAT register.
Table 25-8. 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
R00000000
W
Reset 00000000
= Unimplemented or Reserved
Figure 25-12. RESERVED3