sc9s12hy64j0vllr Freescale Semiconductor, Inc, sc9s12hy64j0vllr Datasheet - Page 517

• Manufacturer Part Number: sc9s12hy64j0vllr
• Description: S12 Microcontrollers Mcu 16-bit Hcs12 Cisc 32kb Flash 5v Tray
• Manufacturer: Freescale Semiconductor, Inc

15.3
This section describes the memory map and registers for the Flash module. Read data from unimplemented
memory space in the Flash module is undefined. Write access to unimplemented or reserved memory space
in the Flash module will be ignored by the Flash module.
15.3.1
The S12 architecture places the P-Flash memory between global addresses 0x3_8000 and 0x3_FFFF as
shown in
The FPROT register, described in
accidental program or erase. Three separate memory regions, one growing upward from global address
0x3_8000 in the Flash memory (called the lower region), one growing downward from global address
0x3_FFFF in the Flash memory (called the higher region), and the remaining addresses in the Flash
memory, can be activated for protection. The Flash memory addresses covered by these protectable regions
are shown in the P-Flash memory map. The higher address region is mainly targeted to hold the boot loader
code since it covers the vector space. Default protection settings as well as security information that allows
the MCU to restrict access to the Flash module are stored in the Flash configuration field as described in
Table
Freescale Semiconductor
1
0x3FF08-0x3_FF0F form a Flash phrase and must be programmed in a single command write sequence. Each byte in
the 0x3_FF08 - 0x3_FF0B reserved field should be programmed to 0xFF.
0x3_FF08-0x3_FF0B
0x3_FF00-0x3_FF07
15-3.
Global Address
0x3_FF0C
0x3_FF0D
0x3_FF0E
0x3_FF0F
Table
Memory Map and Registers
Module Memory Map
15-2.The P-Flash memory map is shown in
1
1
1
1
0x3_8000 – 0x3_FFFF
Global Address
1
(Bytes)
Size
8
4
1
1
1
1
MC9S12HY/HA-Family Reference Manual, Rev. 1.04
Table 15-2. P-Flash Memory Addressing
Section
Table 15-3. Flash Configuration Field
Backdoor Comparison Key
Refer to
Section 15.5.1, “Unsecuring the MCU using Backdoor Key
Reserved
P-Flash Protection byte
Refer to
D-Flash Protection byte
Refer to
Flash Nonvolatile byte
Refer to
Flash Security byte
Refer to
15.3.2.9, can be set to protect regions in the Flash memory from
(Bytes)
Section 15.4.5.11, “Verify Backdoor Access Key
Section 15.3.2.9, “P-Flash Protection Register (FPROT)”
Section 15.3.2.10, “D-Flash Protection Register (DFPROT)”
Section 15.3.2.16, “Flash Option Register (FOPT)”
Section 15.3.2.2, “Flash Security Register (FSEC)”
Size
32 K
P-Flash Block
Contains Flash Configuration Field
(see
Table
.
.
Figure
15-3)
Description
Description
15-2.
32 KByte Flash Module (S12FTMRC32K1V1)
Command,” and
Access”
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