MCF51EM128CLK Freescale Semiconductor, MCF51EM128CLK Datasheet - Page 87

• Manufacturer Part Number: MCF51EM128CLK
• Description: IC MCU 32BIT 128KB FLASH 80LQFP
• Manufacturer: Freescale Semiconductor
• Series: MCF51EMr

Specifications of MCF51EM128CLK

• Core Processor: Coldfire V1
• Core Size: 32-Bit
• Speed: 50MHz
• Connectivity: I²C, SCI, SPI
• Peripherals: LCD, LVD, PWM, WDT
• Number Of I /o: 56
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Data Converters: A/D 12x16b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-LQFP
• Processor Series: MCF51EM
• Core: ColdFire V1
• Data Bus Width: 32 bit
• Data Ram Size: 16 KB
• Interface Type: RS-232, LIN
• Maximum Clock Frequency: 50 MHz
• Number Of Timers: 3
• Operating Supply Voltage: 1.8 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: JLINK-CF-BDM26, EWCF
• Development Tools By Supplier: TWR-MCF51CN-KIT, TWR-SER, TWR-ELEV, TOWER
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

3.4.3.2
The FxOPT register holds all bits associated with the security of the MCU and flash module. All bits in
the FxOPT register are readable but are not writable.
The FxOPT register is loaded from the flash configuration field during the reset sequence, indicated by F
in
The security feature in the flash module is described in
3.4.3.3
The FxCNFG register gates the security backdoor writes.
KEYACC, CBEIE and CCIE are readable and writable while all remaining bits read 0 and are not writable.
KEYACC is writable only if KEYEN is set to the enabled state (see
Register (FxOPT and
Freescale Semiconductor
Figure
KEYEN
Reset
Field
SEC
7–6
5–2
1–0
W
R
3-4.
Backdoor Key Security Enable Bits. The KEYEN[1:0] bits define the enabling of backdoor key access to the
flash module.
00 Disabled
01 Disabled (Preferred KEYEN state to disable Backdoor Key Access)
10 Enabled
11 Disabled
Reserved, should be cleared.
Flash Security Bits. The SEC[1:0] bits define the security state of the MCU. If the flash module is unsecured
using backdoor key access, the SEC[1:0] bits are forced to the unsecured state.
00 Unsecured
01 Unsecured
10 Secured
11 Unsecured
Flash Options Register (FxOPT and NVOPT)
Flash Configuration Register (FxCNFG)
F
7
Flash array reads are allowed while KEYACC is set.
MCF51EM256 Series ColdFire Integrated Microcontroller Reference Manual, Rev. 8
KEYEN
NVOPT)”).
F
6
Figure 3-4. Flash Options Register (FxOPT)
Table 3-8. FxOPT Field Descriptions
0
0
5
NOTE
0
0
4
Description
Section 3.5,
3
0
0
“Security”.
Section 3.4.3.2, “Flash Options
0
0
2
F
1
SEC
F
Memory
0
3-31