MC9S12NE64VTU Freescale Semiconductor, MC9S12NE64VTU Datasheet - Page 75

• Manufacturer Part Number: MC9S12NE64VTU
• Description: IC MCU 25MHZ ETHERNET/PHY 80TQFP
• Manufacturer: Freescale Semiconductor
• Series: HCS12r

Specifications of MC9S12NE64VTU

• Mfg Application Notes: MC9S12NE64 Integrated Ethernet Controller Implementing an Ethernet Interface with the MC9S12NE64 Web Server Development with MC9S12NE64 and Open TCP
• Core Processor: HCS12
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: EBI/EMI, Ethernet, I²C, SCI, SPI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 38
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 2.375 V ~ 3.465 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 80-TQFP Exposed Pad, 80-eTQFP, 80-HTQFP, 80-VQFP
• Data Bus Width: 16 bit
• Data Ram Size: 8 KB
• Interface Type: I2C, SCI, SPI
• Maximum Clock Frequency: 25 MHz
• Number Of Programmable I/os: 70
• Number Of Timers: 16 bit
• Operating Supply Voltage: - 0.3 V to + 3 V
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 65 C
• On-chip Adc: 10 bit
• For Use With: EVB9S12NE64E - BOARD EVAL FOR 9S12NE64DEMO9S12NE64E - DEMO BOARD FOR 9S12NE64
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

All bits in the FSEC register are readable but are not writable.
The FSEC register is loaded from the Flash Configuration Field at address $FF0F during the reset
sequence, indicated by F in
The security function in the Flash module is described in
Freescale Semiconductor
KEYEN[1:0]
RNV[5:2]
SEC[1:0]
Reset
Field
1-0
5-2
1-0
W
R
Backdoor Key Security Enable Bits —The KEYEN[1:0] bits define the enabling of backdoor key access to the
Flash module as shown in
Reserved Nonvolatile Bits — The RNV[5:2] bits must remain in the erased 1 state for future enhancements.
Flash Security Bits — The SEC[1:0] bits define the security state of the MCU as shown in
module is unsecured using backdoor key access, the SEC bits are forced to 10.
F
7
KEYEN
= Unimplemented or Reserved
1
1
Preferred KEYEN state to disable Backdoor Key Access.
Preferred SEC state to set MCU to secured state.
6
F
Figure
KEYEN[1:0]
SEC[1:0]
Figure 2-5. Flash Security Register (FSEC)
01
01
00
10
11
00
10
11
1
1
Table
2-5.
Table 2-5. FSEC Field Descriptions
RNV5
Table 2-7. Flash Security States
Table 2-6. Flash KEYEN States
MC9S12NE64 Data Sheet, Rev. 1.1
5
F
2-6.
RNV4
Status of Backdoor Key Access
4
F
Description
Status of Security
Section 2.6, “Flash Module
UNSECURED
DISABLED
DISABLED
DISABLED
ENABLED
SECURED
SECURED
SECURED
RNV3
F
3
RNV2
2
F
Memory Map and Register Definition
Security”.
1
F
Table
SEC
2-7. If the Flash
F
0
75