MC9S12HZ256_08 Datasheet, PDF (106/692 Pages) Freescale Semiconductor, Inc – Microcontrollers

Chapter 3 2 Kbyte EEPROM Module (EETS2KV1)
For sector erase, the MCU address bits AB[1:0] are ignored.
For mass erase, any address within the block is valid to start the command.
MC9S12HZ256 Data Sheet, Rev. 2.05
106
Freescale Semiconductor