MCF51EM256CLL Freescale Semiconductor, MCF51EM256CLL Datasheet - Page 439

• 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

consumption, the MTIM16 should be stopped by software if it is not needed as an interrupt source during
wait mode.
19.2.2.2
The MTIM16 is disabled in all stop modes, regardless of the settings before executing the STOP
instruction. Therefore, the MTIM16 cannot be used as a wake up source from stop mode.
Upon waking from stop2 mode, the MTIM16 will enter its reset state. If stop3 is exited with a reset, the
MTIM16 will enter its reset state. If stop3 is exited with an interrupt, the MTIM16 continues from the state
it was in stop3 . If the counter was active upon entering stop3, the count will resume from the current value.
19.2.2.3
The MTIM16 stops all counting until the microcontroller returns to normal user operating mode. Counting
resumes from the suspended value as long as an MTIM16 reset did not occur (TRST written to a 1).
19.3
19.3.1
The MTIM16 includes one external signal, TCLK, used to input an external clock when selected as the
MTIM16 clock source.The signal properties of TCLK are shown in
The TCLK input must be synchronized by the bus clock. Also, variations in duty cycle and clock jitter
must be accommodated. As a result, the TCLK signal must be limited to one-fourth of the bus frequency.
The TCLK pin can be muxed with a general-purpose port pin. See
the pin location and priority of this function.
19.4
Each MTIM16 includes four registers:
A 16-bit modulo registerRefer to the direct-page register summary in the Memory chapter for the absolute
address assignments for all MTIM16 registers.This section refers to registers and control bits only by their
names and relative address offsets.
Some MCUs may have more than one MTIM16, so register names include placeholder characters to
identify the correct MTIM16.
Freescale Semiconductor
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An 8-bit status and control register
An 8-bit clock configuration register
A 16-bit counter register
External Signal Description
Register Definition
TCLK — External Clock Source Input into MTIM16
MTIM16 in Stop Modes
MTIM16 in Active Background Mode
MCF51EM256 Series ColdFire Integrated Microcontroller Reference Manual, Rev. 8
Signal
TCLK
Table 19-1. TCLK Properties
External clock source input into MTIM16
Function
Chapter 2, “Pins and
Table
19-1.
I/O
I
16-Bit Modulo Timer (MTIM16)
Connections” for
19-3