MC9S12HZ256 Datasheet, PDF (63/692 Pages) Freescale Semiconductor, Inc – HCS12 Microcontrollers

Chapter 2 256 Kbyte Flash Module (FTS256K2V1)
The Flash module also contains a set of 16 control and status registers located in address space module
base + 0x0000 to module base + 0x000F. In order to accommodate more than one Flash block with a
minimum register address space, a set of registers located from module base + 0x0004 to module
base + 0x000B are repeated in all banks. The active register bank is selected by the BKSEL bits in the
unbanked Flash configuration register (FCNFG). A summary of these registers is given in Table 2-3 while
their accessibility in normal and special modes is detailed in Section 2.3.2, “Register Descriptions”.
Table 2-3. Flash Register Map
Module
Base +
Register Name
0x0000 Flash Clock Divider Register (FCLKDIV)
0x0001
0x0002
Flash Security Register (FSEC)
Flash Test Mode Register (FTSTMOD)¹
0x0003 Flash Configuration Register (FCNFG)
0x0004 Flash Protection Register (FPROT)
0x0005 Flash Status Register (FSTAT)
0x0006 Flash Command Register (FCMD)
0x0007
0x0008
0x0009
Flash Control Register (FCTL)
Flash High Address Register (FADDRHI)¹
Flash Low Address Register (FADDRLO)¹
0x000A Flash High Data Register (FDATAHI)
0x000B Flash Low Data Register (FDATALO)
0x000C RESERVED1¹
0x000D RESERVED2¹
0x000E RESERVED3¹
0x000F RESERVED4¹
1 _{Intended for factory test purposes only.}
Normal Mode
Access
R/W
R
R
R/W
R/W
R/W
R/W
R
R
R
R
R
R
R
R
R
MC9S12HZ256 Data Sheet, Rev. 2.04
Freescale Semiconductor
63