Freescale Semiconductor Demonstration Board for Freescale MC9S12XHY256 Microcontroller DEMO9S12XHY256 DEMO9S12XHY256 用户手册

产品代码

DEMO9S12XHY256

128 KByte Flash Module (S12XFTMR128K1V1)

MC9S12XHY-Family Reference Manual, Rev. 1.04

636

Freescale Semiconductor

All possible P-Flash protection scenarios are shown in

Figure 19-14

. Although the protection scheme is

loaded from the Flash memory at global address 0x7F_FF0C during the reset sequence, it can be changed
by the user. The P-Flash protection scheme can be used by applications requiring reprogramming in single
chip mode while providing as much protection as possible if reprogramming is not required.

Table 19-19. P-Flash Protection Lower Address Range

FPLS[1:0]

Global Address Range

Protected Size

0x7F_8000–0x7F_83FF

1 Kbyte

0x7F_8000–0x7F_87FF

2 Kbytes

0x7F_8000–0x7F_8FFF

4 Kbytes

0x7F_8000–0x7F_9FFF

8 Kbytes