MCF51EM128CLL Freescale Semiconductor, MCF51EM128CLL Datasheet - Page 442

• 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

16-Bit Modulo Timer (MTIM16)
When either MTIMxCNTH or MTIMxCNTL is read, the content of the two registers is latched into a
buffer where they remain latched until the other register is read.This allows the coherent 16-bit to be read
in both big-endian and little-endian compile environments and ensures the 16-bit counter is unaffected by
the read operation. The coherency mechanism is automatically restarted by an MCU reset or setting of
TRST bit of MTIMxSC register (whether BDM mode is active or not).
When BDM is active, the coherency mechanism is frozen such that the buffer latches remain in the state
they were in when the BDM became active, even if one or both halves of the counter register are read while
BDM is active. This assures that if the user was in the middle of reading a 16-bit register when BDM
became active, the appropriate value from the other half of the 16-bit value will be read after returning to
normal execution.The value read from the MTIMxCNTH and MTIMxCNTL registers in BDM mode is
the value of these registers and not the value of their read buffer.
19.4.4
19-6
MODH
CNTL
Field
Field
7:0
7:0
Reset:
Reset:
W
W
R
R
MTIM16 Count (Low Byte) — These eight read-only bits contain the current low byte value of the 16-bit counter.
writing has no effect to this register. Reset clears the register to 0x00.
MTIM16 Modulo (High Byte) — These eight read/write bits contain the modulo high byte value used to reset the
counter and set TOF.Reset sets the register to 0x00.
MTIM16 Modulo Register High/Low (MTIMxMODH/MTIMxMODL)
MCF51EM256 Series ColdFire Integrated Microcontroller Reference Manual, Rev. 8
7
0
7
0
Figure 19-6. MTIM16 Modulo Register High (MTIMxMODH)
Figure 19-5. MTIM16 Counter Register Low (MTIMxCNTL)
0
0
6
6
Table 19-6. MTIMxMODH Field Descriptions
Table 19-5. MTIMxCNTL Field Descriptions
0
0
5
5
0
0
4
4
Description
Description
MODH
CNTL
0
0
3
3
0
0
2
2
Freescale Semiconductor
0
0
1
1
0
0
0
0