MCF51EM256CLK Freescale Semiconductor, MCF51EM256CLK Datasheet - Page 276

• Manufacturer Part Number: MCF51EM256CLK
• Description: IC MCU 32BIT 256KB FLASH 80LQFP
• Manufacturer: Freescale Semiconductor
• Series: MCF51EMr

Specifications of MCF51EM256CLK

• Core Processor: Coldfire V1
• Core Size: 32-Bit
• Speed: 50MHz
• Connectivity: I²C, SCI, SPI
• Peripherals: LCD, LVD, PWM, WDT
• Number Of I /o: 56
• 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 12x16b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-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

8-bit Serial Peripheral Interface (SPI)
12.1.3
As shown in
prescale bits (SPPR2:SPPR1:SPPR0) choose a prescale divisor of 1, 2, 3, 4, 5, 6, 7, or 8. The three rate
select bits (SPR3:SPR2:SPR1:SPR0) divide the output of the prescaler stage by 2, 4, 8, 16, 32, 64, 128,
256,or 512 to get the internal SPI master mode bit-rate clock.
12-4
BUS RATE
CLOCK
SPI SYSTEM
ENABLE
LSBFE
MSTR
SPE
SPI Baud Rate Generation
CLOCK GENERATOR
Figure
MCF51EM256 Series ColdFire Integrated Microcontroller Reference Manual, Rev. 8
SPIBR
MASTER/SLAVE
MODE SELECT
12-3, the clock source for the SPI baud rate generator is the bus clock. The three
SHIFT
OUT
SHIFT
DIRECTION
Tx BUFFER (WRITE
Rx BUFFER (READ
MODE FAULT
DETECTION
SPI SHIFT REGISTER
CLOCK
CLOCK
LOGIC
SHIFT
Figure 12-2. SPI Module Block Diagram
MODF
Rx BUFFER
SPRF
FULL
SPIx
SPIx
D)
D)
Tx BUFFER
EMPTY
SHIFT
SPTEF
SPTIE
SPIE
IN
MASTER CLOCK
SLAVE CLOCK
BIDIROE
MODFEN
SPC0
SSOE
PIN CONTROL
M
S
M
S
M
S
MASTER/
SLAVE
Freescale Semiconductor
SPI
INTERRUPT
REQUEST
MOSI
(MOMI)
MISO
(SISO)
SPSCK
SS