S912XEP768J5MAGR Freescale Semiconductor, S912XEP768J5MAGR Datasheet - Page 896

• Manufacturer Part Number: S912XEP768J5MAGR
• Description: 16-bit Microcontrollers - MCU 16-bit 768K Flash
• Manufacturer: Freescale Semiconductor

Specifications of S912XEP768J5MAGR

• Rohs: yes
• Core: HCS12X
• Processor Series: MC9S12
• Data Bus Width: 16 bit
• Maximum Clock Frequency: 50 MHz
• Program Memory Size: 768 KB
• Data Ram Size: 48 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 3.3 V to 5 V
• Operating Temperature Range: - 40 C to + 125 C
• Package / Case: LQFP-144
• Mounting Style: SMD/SMT

Chapter 25 256 KByte Flash Module (S12XFTM256K2V1)
25.3
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.
25.3.1
The S12X architecture places the P-Flash memory between global addresses 0x78_0000 and 0x7F_FFFF
as shown in
The FPROT register, described in
accidental program or erase. Three separate memory regions, one growing upward from global address
0x7F_8000 in the Flash memory (called the lower region), one growing downward from global address
0x7F_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
896
0x7F_FF00 – 0x7F_FF07
25-3.
Global Address
0x7F_FF0B
0x7F_FF08 –
0x7F_FF0C
0x7F_FF0D
0x7F_FF0E
Memory Map and Registers
Module Memory Map
Table
(2)
0x7A_0000 – 0x7D_FFFF
0x7E_0000 – 0x7F_FFFF
0x78_0000 – 0x79_FFFF
2
2
2
25-2. The P-Flash memory map is shown in
Global Address
(Bytes)
Size
8
4
1
1
1
MC9S12XE-Family Reference Manual Rev. 1.25
Table 25-2. P-Flash Memory Addressing
Table 25-3. Flash Configuration Field
Section
Backdoor Comparison Key
Refer to
Section 25.5.1, “Unsecuring the MCU using Backdoor Key
Reserved
P-Flash Protection byte
Refer to
EEE Protection byte
Refer to
Flash Nonvolatile byte
Refer to
25.3.2.9, can be set to protect regions in the Flash memory from
(Bytes)
128 K
256 K
128 K
Section 25.4.2.12, “Verify Backdoor Access Key
Section 25.3.2.9, “P-Flash Protection Register (FPROT)”
Section 25.3.2.10, “EEE Protection Register (EPROT)”
Section 25.3.2.14, “Flash Option Register (FOPT)”
Size
P-Flash Block 0
Contains Flash Configuration Field
(see
No P-Flash Memory
P-Flash Block 1
Table
.
25-3)
Figure
Description
Description
(1)
25-2.
Command,” and
Freescale Semiconductor
Access”