S9S12G48F0MLH Freescale Semiconductor, S9S12G48F0MLH Datasheet - Page 926
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S9S12G48F0MLH
Manufacturer Part Number
S9S12G48F0MLH
Description
16-bit Microcontrollers - MCU 16Bit 48KFlash 4096RAM MSCAN
Manufacturer
Freescale Semiconductor
Datasheet
1.S9S12G96F0CLL.pdf
(1292 pages)
Specifications of S9S12G48F0MLH
Rohs
yes
Core
S12
Processor Series
MC9S12G
Data Bus Width
16 bit
Maximum Clock Frequency
25 MHz
Program Memory Size
48 KB
Data Ram Size
2 KB
On-chip Adc
Yes
Operating Supply Voltage
3.13 V to 5.5 V
Operating Temperature Range
- 40 C to + 125 C
Package / Case
LQFP-64
Mounting Style
SMD/SMT
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48 KByte Flash Module (S12FTMRG48K1V1)
26.4.8
The Flash module is not affected if the MCU enters wait mode. The Flash module can recover the MCU
from wait via the CCIF interrupt (see
26.4.9
If a Flash command is active (CCIF = 0) when the MCU requests stop mode, the current Flash operation
will be completed before the MCU is allowed to enter stop mode.
26.5
The Flash module provides security information to the MCU. The Flash security state is defined by the
SEC bits of the FSEC register (see
register using data read from the security byte of the Flash configuration field at global address 0x3_FF0F.
The security state out of reset can be permanently changed by programming the security byte assuming
that the MCU is starting from a mode where the necessary P-Flash erase and program commands are
available and that the upper region of the P-Flash is unprotected. If the Flash security byte is successfully
programmed, its new value will take affect after the next MCU reset.
The following subsections describe these security-related subjects:
26.5.1
The MCU may be unsecured by using the backdoor key access feature which requires knowledge of the
contents of the backdoor keys (four 16-bit words programmed at addresses 0x3_FF00-0x3_FF07). If the
KEYEN[1:0] bits are in the enabled state (see
command (see
keys stored in the Flash memory via the Memory Controller. If the keys presented in the Verify Backdoor
Access Key command match the backdoor keys stored in the Flash memory, the SEC bits in the FSEC
register (see
not permitted as backdoor keys. While the Verify Backdoor Access Key command is active, P-Flash
memory and EEPROM memory will not be available for read access and will return invalid data.
928
•
•
•
Unsecuring the MCU using Backdoor Key Access
Unsecuring the MCU in Special Single Chip Mode using BDM
Mode and Security Effects on Flash Command Availability
Security
Wait Mode
Stop Mode
Unsecuring the MCU using Backdoor Key Access
Table
Section
26-11) will be changed to unsecure the MCU. Key values of 0x0000 and 0xFFFF are
26.4.6.11) allows the user to present four prospective keys for comparison to the
MC9S12G Family Reference Manual,
Table
Section 26.4.7,
26-11). During reset, the Flash module initializes the FSEC
Section
“Interrupts”).
26.3.2.2), the Verify Backdoor Access Key
Rev.1.23
Freescale Semiconductor
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