MCF51EM128CLL Freescale Semiconductor, MCF51EM128CLL Datasheet - Page 412

• Manufacturer Part Number: MCF51EM128CLL
• Description: IC MCU 32BIT 128KB FLASH 100LQFP
• Manufacturer: Freescale Semiconductor
• Series: MCF51EMr

Specifications of MCF51EM128CLL

• Core Processor: Coldfire V1
• Core Size: 32-Bit
• Speed: 50MHz
• Connectivity: I²C, SCI, SPI
• Peripherals: LCD, LVD, PWM, WDT
• Number Of I /o: 63
• 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 16x12b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-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: Lead free / RoHS Compliant

Independent Robust Real Time Clock (IRTC)
17.5.18 IRTC Compensation Register (IRTC_COMPEN)
The compensation register stores the compensation value that will be used by the compensation block to
correct the 1 Hz clock. This value gives the number of oscillator clock cycles to be added or removed. The
value that is stored is in the 2’s complement format. The range of value that can be programmed is –128
to 127. When the compensation cycle is complete the ‘Done’ bit in the status register is set. IRTC will
continue to compensate with this value until unless disabled. If in between a new value is programmed
then that cycle will start only when compensation cycle is over.
17-28
Reset Value
Reset Value
Field
15–8
IRTC_COMPEN
7–0
Bit Type
Bit Type
Field
Field
MCF51EM256 Series ColdFire Integrated Microcontroller Reference Manual, Rev. 8
Compensation Interval. Indicates the window over which the compensation has to be carried out. Minimum
interval is 1 second and maximum is 255 seconds. A compensation interval of 0 disables the
compensation logic. MCU can simply write zeros to these bits to disable the compensation logic. Non-zero
value starts the compensation logic. Assertion of “Done” bit clears this register.
Compensation value. Two’s complement number which indicates the number of
Oscillator clock cycles the IRTC requires to compensate for the specified compensation interval. Range:
–128 to +127. A value of zero indicates no compensation is needed.
Bit 15
Bit 7
rw
rw
0
0
Figure 17-19. IRTC Compensation Register (IRTC_COMPEN)
Bit 14
Table 17-21. IRTC_COMPEN Field Descriptions
Bit 6
rw
rw
0
0
Bit 13
Bit 5
rw
rw
0
0
COMPENSATION_INTERVAL
COMPENSATION_VALUE
Compensation Register
Bit 12
Bit 4
rw
rw
0
0
Description
Bit 11
Bit 3
rw
rw
0
0
Bit 10
Bit 2
rw
rw
0
0
Bit 9
Bit 1
rw
rw
0
0
Freescale Semiconductor
Bit 8
Bit 0
Offset: 0x28
rw
rw
0
0
0x28
0x29