MCF51EM256CLL Freescale Semiconductor, MCF51EM256CLL Datasheet - Page 438

• Manufacturer Part Number: MCF51EM256CLL
• Description: IC MCU 32BIT 256KB FLASH 100LQFP
• Manufacturer: Freescale Semiconductor
• Series: MCF51EMr

Specifications of MCF51EM256CLL

• 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: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K 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: DEMOEM
• 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)
19.2
Timer system features include:
19.2.1
The block diagram for the modulo timer module is shown
19.2.2
This section defines MTIM16 operation in stop, wait, and background debug modes.
19.2.2.1
The MTIM16 continues to run in wait mode if enabled prior to the execution of the WAIT instruction. The
timer overflow interrupt brings the MCU out of wait mode if it is enabled. For lowest possible current
19-2
BUSCLK
XCLK
TCLK
INTERRUPT
REQUEST
MTIMx16
•
•
•
16-bit up-counter
— Free-running or 16-bit modulo limit
— Software controllable interrupt on overflow
— Counter reset bit (TRST)
— Counter stop bit (TSTP)
Four software selectable clock sources for input to prescaler:
— System bus clock — rising edge
— Fixed frequency clock (XCLK) — rising edge
— External clock source on the TCLK pin — rising edge
— External clock source on the TCLK pin — falling edge
Nine selectable clock prescale values:
— Clock source divide by 1, 2, 4, 8, 16, 32, 64, 128, or 256
Features
Block Diagram
Modes of Operation
MTIM16 in Wait Mode
MCF51EM256 Series ColdFire Integrated Microcontroller Reference Manual, Rev. 8
SYNC
TOF
TOIE
Figure 19-1. Modulo Timer (S08MTIM16) Block Diagram
SOURCE
SELECT
CLOCK
CLKS
AND SELECT
PRESCALE
DIVIDE BY
PS
Figure
19-1.
16-BIT COMPARATOR
16-BIT COUNTER
16-BIT MODULO
(MTIMxxMOD)
(MTIMxxCNT)
Freescale Semiconductor
TRST
TSTP