MCF5249LAG120 Freescale Semiconductor, MCF5249LAG120 Datasheet - Page 340

• Manufacturer Part Number: MCF5249LAG120
• Description: IC MPU 32BIT COLDF 144-LQFP
• Manufacturer: Freescale Semiconductor
• Series: MCF524xr

Specifications of MCF5249LAG120

• Core Processor: Coldfire V2
• Core Size: 32-Bit
• Speed: 120MHz
• Connectivity: I²C, IDE, MMC, SPI, UART/USART
• Peripherals: DMA, I²S, POR, Serial Audio, WDT
• Number Of I /o: 34
• Program Memory Type: ROMless
• Ram Size: 96K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 4x12b
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 144-LQFP
• Family Name: MCF5xxx
• Device Core: ColdFire
• Device Core Size: 32b
• Frequency (max): 120MHz
• Instruction Set Architecture: RISC
• Supply Voltage 1 (typ): 1.8V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 144
• Package Type: LQFP
• Maximum Clock Frequency: 120 MHz
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: 0 C
• Program Memory Size: 8KB
• Cpu Speed: 120MHz
• Embedded Interface Type: I2C, QSPI, UART
• Digital Ic Case Style: LQFP
• No. Of Pins: 144
• Rohs Compliant: Yes
• For Use With: M5249C3 - KIT EVAL FOR M5249 W/ETHERNET
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Lead Free Status / Rohs Status: Compliant

Freescale Semiconductor, Inc.
BTST.B #0,(A7)+
BNE.B END
MOVE.B TXCNT,D0;Get value from the transmitting counter
BEQ.S END;If no more data, branch to end
MOVE.B DATABUF,-(A7);Transmit next byte of data
MOVE.B (A7)+,MBDR
MOVE.B TXCNT,D0;Decrease the TXCNT
SUBQ.L #1,D0
MOVE.B D0,TXCNT
BRA.S EMASTX;Exit
END LEA.L MBCR,-(A7);Generate a STOP condition
BCLR.B #5,(A7)+
EMASTX RTE; Return from interrupt
MASR MOVE.B RXCNT,D0;Decrease RXCNT
SUBQ.L #1,D0
MOVE.B D0,RXCNT
BEQ.S ENMASR;Last byte to be read
MOVE.B RXCNT,D1;Check second-to-last byte to be read
EXTB.L D1
SUBI.L #1,D1;
BNE.S NXMAR; Not last one or second last
LAMAR BSET.B #3,MBCR;Disable ACK
BRA NXMAR
ENMASR BCLR.B #5,MBCR; Last one, generate 'STOP'signal
NXMAR MOVE.B MBDR,RXBUF; Read data and store RTE
Generation of Repeated START
At the end of data transfer, if the master still wants to communicate on the bus, it can generate another START signal followed
by another slave address without first generating a STOP signal. A program example follows.
RESTART MOVE.B MBCR,-(A7); Another START (RESTART)
BSET.B #2, (A7)
MOVE.B (A7)+, MBCR
MOVE.B CALLING,-(A7);Transmit the calling address, D0=R/W-
MOVE.B CALLING,-(A7);
MOVE.B (A7)+, MBDR
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